has no declaration in the base values folder报错

原创 已于 2023-10-12 09:31:59 修改 · 1.4k 阅读 · 1 ·
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#android-studio

于 2023-10-12 09:31:23 首次发布
本文描述了在AndroidStudio中遇到的编译问题，源于value.xml中的某个维度声明在基础值文件夹中未定义，导致在配置不匹配时可能导致崩溃。问题可能由于值在缓存中的重复引用引起，解决方案是清理项目缓存。

value.xml
The dimen “xxxxxxx” invalue.xml has no declaration in the base values folder; this can lead to crashes when the resource is queried in a configuration that does not match this qualifier
出现原因：Android studio 编译后 ，copy 其他文件夹的值到另外一个文件夹，导致该值下划线报错。
可能原因：这个值在缓存中存在，并且又在一个地方出现导致的问题。
可能解决的方法：清除缓存 clean project

TypeScript报错信息表（备注）
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code 类型 英文描述 中文描述 1002 错误 Unterminated string literal. 未终止的字符串文本。 1003 错误 Identifier expected. 应为标识符。 1005 错误 '{0}' expected. 应为“{0}”。 1006 错误 A file cannot have a reference to itself. 文件不能引用自身。 1009...
Android 资源报错：has no declaration in the base values folder； this can lead to crashes when the resourc
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背景： 我们在适配不同分辨率的时候，经常会对一些尺寸进行不同分辨率进行设置 我们在处理dimen是，发现报错，或者其他资源 The dimen "fxdimen_px_800" in values-sw393dp has no declaration in the base values folder; this can lead to crashes when the resource is queried in a configuration that does not match this qu
The dimen in values has no declaration in the base values folder； this can lead to crashes when the
走马川行雪的博客
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1、values文件报错 报错信息：The dimen "keyboard_verticalGap" in values-1280x720 has no declaration in the base values folder; this can lead to crashes when the resource is queried in a configuration that does not match this qualifier 位置：xml存放数值的文件 项目情况：项目的res目录下.
The color “baseBlac in values has no declaration in the base values folder this can lead to crash
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在module lib中定义了如下资源 然后就报了这个错误 "The color “baseBlac” in values has no declaration in the base values folder; this can lead to crash 导致我无法通过R.color.baseBlack引用 解决办法 此时，你会发现可以通过R.color.baseBlack引用了 但有个小问题，就是colors文件失去了代码高亮的效果，但并不影响运行，只能将就下了。 ...
【具体问题】The color “colorRed” in values has no declaration in the base values folder；
qq_36478274的博客
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版本： 错误： "The color “colorRed” in values has no declaration in the base values folder; this can lead to crashes when the resource is queried in a configuration that does not match this qualifier le...
The layout “xxx“ in layout has no declaration in the base layout folderMissingDefaultResource
xiaokang666的博客
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The layout "xxx" in layout has no declaration in the base layout folderMissingDefaultResource
Android The layout “activity_main“ in layout has no declaration in the base layout folder
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报错：???????? The layout "activity_main" in layout has no declaration in the base layout folder; this can lead to crashes when the resource is queried in a configuration that does not match this qualifier.详情：...
1. What is an IDE (Integrated Development Environment), and what are its main components? 2. What is the role of a compiler in the C++ development process? 3. What is the difference between source code (e.g., a .cpp file) and an executable file? 4. In the "Hello, World!" program, what is the purpose of the line #include <iostream>? 5. What is special about the main() function in a C++ program? 6. Why do computers fundamentally operate using the binary (base-2) system? 7. What is the base of the hexadecimal system? Why is it often used by programmers as a shorthand for binary numbers? 8. Explain the "triad" method for converting an octal number to binary. 9. Briefly describe the "division by 2" method for converting a decimal number to binary. 10. What is the decimal value of the binary number 1011？ 1. What is the purpose of the std::cout object? Which header file must be included to use it? 2.What is the difference between an escape sequence like \n and a manipulator like std::endl? (Hint: Both create a new line, but they have a subtle difference). 3.How would you print the following text to the console, including the quotes and the backslash: He said: "The file is in C:\Users\"? 4.Is it possible to write an entire multi-line text output using only one std::cout statement? If yes, how? 5.What is a syntax error? Give an example of a syntax error from Task 2. （Task 2: Debugging The following program contains several syntax errors. Copy the code into your IDE, identify the errors, fix them, and run the program to ensure it works correctly. Incorrect Code: */ Now you should not forget your glasses // #include <stream> int main { cout << "If this text" , cout >> " appears on your display, cout << " endl;" cout << 'you can pat yourself on ' << " the back!" << endl. return 0; "; ) Hint: Pay close attention to comments, header files, brackets ({}), operators (<<), semicolons, and how strings and manipulators are written.） 1. What is the difference between variable declaration and initialization? 2.What will be the result of the expression 7 / 2 in C++? Why? 3.What will be the result of the expression 10 % 3? What is the main purpose of the modulus operator? 4. What is the purpose of std::cin and the >> operator? 5. A beginner tries to swap two integer variables a and b with the code a = b; b = a;. Why will this not work correctly？ 1. What is an algorithm? Name the primary ways to represent an algorithm. 2.List the main flowchart symbols and explain their purpose. 3.What are the three fundamental types of algorithm structures? Briefly describe each. 4.In a branching algorithm, what determines the flow of execution? 5.What is the key characteristic of a linear algorithm? 6.When is a cyclic algorithm structure used?7. 8. 9. 7.Explain the purpose of a connector in a flowchart. 8.What is the difference between a predefined process block and a standard process block? 9.In the context of solving a quadratic equation algorithm, what condition must be checked before calculating the roots? Why？ 1. What are the three main approaches to data input and output offered by C++? 2. What is the purpose of the SetConsoleOutputCP(65001) and SetConsoleCP(65001)
functions in the provided C++ program example? 3. Explain the difference between the cin and cout objects in Stream 1/0. 4. When using formatted 1/0, which header file must be included to use manipulators like setw and setprecision? 5. List three manipulators used for data output in C++ and briefly describe what each one does. 6. In Formatted I/0 using printf), what are the conversion specifications for a decimal integer and a real number in exponential form? 7. What is the difference in how the & (address-of) operator is used when inputting a value for an integer variable versus a string variable using the scanf() function? 8. Which Character I/O function is used to output a single character to the screen, and which is used to output a string? 9. Describe the syntax and function of the ternary operator in C++. 10. What is the difference between the logical AND (&&) and logical OR (I|) operators when combining multiple conditions? 11. When is the default label executed in a C++ switch statement? 12. What is the primary purpose of the break statement within a switch block? 1. What is the main purpose of using loops in programming? 2. Explain the key difference between the for, while, and do while loops. 3. What happens if you forget to include the increment/decrement statement in a while loop? 4. How can you interrupt an infinite loop during program execution? 5. What is the role of the setw() and setfill) manipulators in C++? 6. In a nested loop, how does the inner loop behave relative to the outer loop? 7. What is type casting, and why is it used in loop calculations? 8. How does the do while loop differ from the while loop in terms of condition checking? 9. What output formatting options can be used to align numerical results in columns? 10*. How would you modify a loop to skip certain iterations based on a condition? 1. List the six main biwise operators in C++ and explain the function of each. 2. Why cannot bitwise operations be applied to variables of floating-point type? 3. Explain the purpose of the << (left shift) and >> (right shift) operators. What is the typical effect on the decimal value of a number when it is shifted left by 1? Shifted right by 1? 4. Describe the process of using a mask to check the value of a specific bit within an
integer. 5. How can you use the bitwise AND operator (&) to check if a number is even or odd?
Explain the logic. 6. What is the difference between the logical AND (&&) and the bitwise AND (&)? Provide an example scenario for each. 7. Explain the purpose of the ~ (bitwise NOT) operator. What is the result of applying it to a mask, and how can this be useful? 1. What is the primary goal of program debugging? What types of errors can it help identify? 2. Describe the difference between Step Over (F10) and Step Into (F11) debugging commands. When would you choose one over the other? 3. What is the purpose of a breakpoint in planned debugging? How do you set and remove a breakpoint in Visual Studio? 4. Explain the utility of the "Watch" window compared to the "Autos" or "Locals" windows during a debugging session. 5. What is the key difference between the Debug and Release configurations when building a project? Why is it necessary to create a Release version after successful debugging? 6. List at least three types of files commonly found in a project's Debug folder and briefly state their purpose (e.g., *.pdb). 7. During debugging, you notice a variable has an incorrect value. How can you change its value during runtime to test a hypothesis without modifying the source code? 8. What command is used to exit the debug mode and stop the current debugging session? 1. What is an array in C++? List its three main characteristics. 2. How are array elements numbered in C++? What is the valid index range for an array declared as int data[25];? 3. Explain the difference between array declaration and initialization. Provide an example of each. 4. What is an initializer list? What happens if the initializer list is shorter than the array size? 5. How can you let the compiler automatically determine the size of an array during initialization? 6. What values do elements of a local array contain if it is declared but not explicitly initialized? How does this differ from a global array? 7. What is an array out-of-bounds error? Why is it dangerous, and what are its potential consequences? 8. How do you calculate the number of elements in an array using the sizeof operator?
Provide the formula. What is a significant limitation of this method? 9. Why is it impossible to copy the contents of one array into another using the assignment
operator (arrayB = arrayA;)? What is the correct way to perform this operation? 10. Why does comparing two arrays using the equality operator (arrayA == arrayB) not check if their elements are equal? How should array comparison be done correctly? 11. What does the name of an array represent in terms of memory? 1. What is a pointer in C++ and what are its two main attributes? 2. Explain the difference between the & and * operators when working with pointers. 3. Why is pointer initialization critical and what dangers do uninitialized pointers pose? 4. What is the fundamental relationship between arrays and pointers in C++? 5. How does pointer arithmetic work and why does ptr + 1 advance by the size of the pointed type rather than 1 byte? 6. What is the difference between an array name and a pointer variable? Why can't you increment an array name? 7. What are the differences between const int*, int* const, and const int* const? 8. How can you safely iterate through an array using pointers, and what are the boundary risks? 9. What is a null pointer and why should you check for nullptr before dereferencing? 10. How do you access array elements using pointer syntax, and how does the compiler translate arr[i] internally? 1. What is a multidimensional array? How is a two-dimensional array structured in memory? 2. Explain the concept of an "array of arrays". How does this relate to the declaration int arr/ROWS//COLS;? 3. The name of a two-dimensional array without indices is a pointer constant. What does this pointer point to? What do the expressions *(A + i) and *(*(A + i) +j) mean for a two-dimensional array A? 4. Describe the different ways to access the element A/1/[2/ of a two-dimensional array
using pointers. 5. What is the rule for omitting the size of dimensions when initializing and when passing a multidimensional array to a function? Why is it allowed to omit only the first dimension? 6. Explain the principle of "row-major order" for storing two-dimensional arrays in memory.
How does this affect element access? 7. Why are nested loops the standard tool for processing multidimensional arrays?
Describe the typical pattern for iterating through a matrix. 1. How is a character string stored in memory in C++? What is the role of the null terminator (10), and why is it critical for C-style strings? 2. Why must the size of a char array declared to hold a string be at least one greater than the number of characters you intend to store? 3. The array name without an index is a pointer constant. What does the name of a char array point to? 4. What are the two main ways to initialize a C-style string? What is a common mistake when using the initializer list method, and what is its consequence? 5. Why is it necessary to add _CRT_SECURE_NO_WARNINGS to the preprocessor definitions in Visual Studio when working with many standard C library functions?
What is the alternative approach? 6. What is the key difference between stropy and strncpy? Why might strncpy be considered safer? 7. How does the stremp function determine if one string is "less than" another? Why can't you use the == operator to compare two C-style strings for content equality? 8. Describe the purpose and parameters of the strok function. How do you get all tokens from a string? 9. What do the functions strchr and strrchr do? How do they differ? 10. Explain what the strstr function returns and what it is commonly used for. 11. What is the purpose of the functions in the < cctype> header? Give three examples of such functions and their use. 12. What is the difference between tolower(c) and_tolower(c)? When should you use each? 1. What is a function in C++? Name the three core benefits of using functions in a program. 2. What is the difference between a function declaration (prototype) and a function definition? Provide examples. 3. What is a function signature? Which elements are part of the signature, and which are not? 4. What methods of passing parameters to a function do you know? Explain the difference between pass-by-value, pass-by-pointer, and pass-by-reference. 5. Why can't you pass an array to a function by value? What is the correct way to pass an array to a function? 6. What is variable scope? How is it related to functions? 7. How does a function return a value? What happens if a function with a non-void return type does not return a value on all control paths? 8. Can you use multiple return statements in a single function? Provide an example. 9. What is function overloading? What is it based on? 10. How is interaction between functions organized in a program? Provide an example program with several functions. 11. What are default parameters? How are they specified, and in what cases are they useful? 12. How can you prevent a function from modifying the data passed to it? What modifiers are used for this? 13. What is recursion? Provide an example of a recursive function. 14. What common errors occur when working with functions? How can they be avoided? 15. How do you use pointers to functions? Provide an example of declaring and calling a function through a pointer. 用中文解答
最新发布
11-28
3. **如何打印包含引号和反斜杠的文本：He said: "The file is in C:\Users\"？** 使用转义字符： ```cpp std::cout << "He said: \"The file is in C:\\Users\\\""; ``` 4. **能否只用一条 `std::cout` 语句...
1. What is an IDE (Integrated Development Environment), and what are its main components? 2. What is the role of a compiler in the C++ development process? 3. What is the difference between source code (e.g., a .cpp file) and an executable file? 4. In the "Hello, World!" program, what is the purpose of the line #include <iostream>? 5. What is special about the main() function in a C++ program? 6. Why do computers fundamentally operate using the binary (base-2) system? 7. What is the base of the hexadecimal system? Why is it often used by programmers as a shorthand for binary numbers? 8. Explain the "triad" method for converting an octal number to binary. 9. Briefly describe the "division by 2" method for converting a decimal number to binary. 10. What is the decimal value of the binary number 1011？ 1. What is the purpose of the std::cout object? Which header file must be included to use it? 2.What is the difference between an escape sequence like \n and a manipulator like std::endl? (Hint: Both create a new line, but they have a subtle difference). 3.How would you print the following text to the console, including the quotes and the backslash: He said: "The file is in C:\Users\"? 4.Is it possible to write an entire multi-line text output using only one std::cout statement? If yes, how? 5.What is a syntax error? Give an example of a syntax error from Task 2. （Task 2: Debugging The following program contains several syntax errors. Copy the code into your IDE, identify the errors, fix them, and run the program to ensure it works correctly. Incorrect Code: */ Now you should not forget your glasses // #include <stream> int main { cout << "If this text" , cout >> " appears on your display, cout << " endl;" cout << 'you can pat yourself on ' << " the back!" << endl. return 0; "; ) Hint: Pay close attention to comments, header files, brackets ({}), operators (<<), semicolons, and how strings and manipulators are written.） 1. What is the difference between variable declaration and initialization? 2.What will be the result of the expression 7 / 2 in C++? Why? 3.What will be the result of the expression 10 % 3? What is the main purpose of the modulus operator? 4. What is the purpose of std::cin and the >> operator? 5. A beginner tries to swap two integer variables a and b with the code a = b; b = a;. Why will this not work correctly？ 1. What is an algorithm? Name the primary ways to represent an algorithm. 2.List the main flowchart symbols and explain their purpose. 3.What are the three fundamental types of algorithm structures? Briefly describe each. 4.In a branching algorithm, what determines the flow of execution? 5.What is the key characteristic of a linear algorithm? 6.When is a cyclic algorithm structure used?7. 8. 9. 7.Explain the purpose of a connector in a flowchart. 8.What is the difference between a predefined process block and a standard process block? 9.In the context of solving a quadratic equation algorithm, what condition must be checked before calculating the roots? Why？ 1. What are the three main approaches to data input and output offered by C++? 2. What is the purpose of the SetConsoleOutputCP(65001) and SetConsoleCP(65001)
functions in the provided C++ program example? 3. Explain the difference between the cin and cout objects in Stream 1/0. 4. When using formatted 1/0, which header file must be included to use manipulators like setw and setprecision? 5. List three manipulators used for data output in C++ and briefly describe what each one does. 6. In Formatted I/0 using printf), what are the conversion specifications for a decimal integer and a real number in exponential form? 7. What is the difference in how the & (address-of) operator is used when inputting a value for an integer variable versus a string variable using the scanf() function? 8. Which Character I/O function is used to output a single character to the screen, and which is used to output a string? 9. Describe the syntax and function of the ternary operator in C++. 10. What is the difference between the logical AND (&&) and logical OR (I|) operators when combining multiple conditions? 11. When is the default label executed in a C++ switch statement? 12. What is the primary purpose of the break statement within a switch block? 1. What is the main purpose of using loops in programming? 2. Explain the key difference between the for, while, and do while loops. 3. What happens if you forget to include the increment/decrement statement in a while loop? 4. How can you interrupt an infinite loop during program execution? 5. What is the role of the setw() and setfill) manipulators in C++? 6. In a nested loop, how does the inner loop behave relative to the outer loop? 7. What is type casting, and why is it used in loop calculations? 8. How does the do while loop differ from the while loop in terms of condition checking? 9. What output formatting options can be used to align numerical results in columns? 10*. How would you modify a loop to skip certain iterations based on a condition? 1. List the six main biwise operators in C++ and explain the function of each. 2. Why cannot bitwise operations be applied to variables of floating-point type? 3. Explain the purpose of the << (left shift) and >> (right shift) operators. What is the typical effect on the decimal value of a number when it is shifted left by 1? Shifted right by 1? 4. Describe the process of using a mask to check the value of a specific bit within an
integer. 5. How can you use the bitwise AND operator (&) to check if a number is even or odd?
Explain the logic. 6. What is the difference between the logical AND (&&) and the bitwise AND (&)? Provide an example scenario for each. 7. Explain the purpose of the ~ (bitwise NOT) operator. What is the result of applying it to a mask, and how can this be useful? 1. What is the primary goal of program debugging? What types of errors can it help identify? 2. Describe the difference between Step Over (F10) and Step Into (F11) debugging commands. When would you choose one over the other? 3. What is the purpose of a breakpoint in planned debugging? How do you set and remove a breakpoint in Visual Studio? 4. Explain the utility of the "Watch" window compared to the "Autos" or "Locals" windows during a debugging session. 5. What is the key difference between the Debug and Release configurations when building a project? Why is it necessary to create a Release version after successful debugging? 6. List at least three types of files commonly found in a project's Debug folder and briefly state their purpose (e.g., *.pdb). 7. During debugging, you notice a variable has an incorrect value. How can you change its value during runtime to test a hypothesis without modifying the source code? 8. What command is used to exit the debug mode and stop the current debugging session? 1. What is an array in C++? List its three main characteristics. 2. How are array elements numbered in C++? What is the valid index range for an array declared as int data[25];? 3. Explain the difference between array declaration and initialization. Provide an example of each. 4. What is an initializer list? What happens if the initializer list is shorter than the array size? 5. How can you let the compiler automatically determine the size of an array during initialization? 6. What values do elements of a local array contain if it is declared but not explicitly initialized? How does this differ from a global array? 7. What is an array out-of-bounds error? Why is it dangerous, and what are its potential consequences? 8. How do you calculate the number of elements in an array using the sizeof operator?
Provide the formula. What is a significant limitation of this method? 9. Why is it impossible to copy the contents of one array into another using the assignment
operator (arrayB = arrayA;)? What is the correct way to perform this operation? 10. Why does comparing two arrays using the equality operator (arrayA == arrayB) not check if their elements are equal? How should array comparison be done correctly? 11. What does the name of an array represent in terms of memory? 1. What is a pointer in C++ and what are its two main attributes? 2. Explain the difference between the & and * operators when working with pointers. 3. Why is pointer initialization critical and what dangers do uninitialized pointers pose? 4. What is the fundamental relationship between arrays and pointers in C++? 5. How does pointer arithmetic work and why does ptr + 1 advance by the size of the pointed type rather than 1 byte? 6. What is the difference between an array name and a pointer variable? Why can't you increment an array name? 7. What are the differences between const int*, int* const, and const int* const? 8. How can you safely iterate through an array using pointers, and what are the boundary risks? 9. What is a null pointer and why should you check for nullptr before dereferencing? 10. How do you access array elements using pointer syntax, and how does the compiler translate arr[i] internally? 1. What is a multidimensional array? How is a two-dimensional array structured in memory? 2. Explain the concept of an "array of arrays". How does this relate to the declaration int arr/ROWS//COLS;? 3. The name of a two-dimensional array without indices is a pointer constant. What does this pointer point to? What do the expressions *(A + i) and *(*(A + i) +j) mean for a two-dimensional array A? 4. Describe the different ways to access the element A/1/[2/ of a two-dimensional array
using pointers. 5. What is the rule for omitting the size of dimensions when initializing and when passing a multidimensional array to a function? Why is it allowed to omit only the first dimension? 6. Explain the principle of "row-major order" for storing two-dimensional arrays in memory.
How does this affect element access? 7. Why are nested loops the standard tool for processing multidimensional arrays?
Describe the typical pattern for iterating through a matrix. 1. How is a character string stored in memory in C++? What is the role of the null terminator (10), and why is it critical for C-style strings? 2. Why must the size of a char array declared to hold a string be at least one greater than the number of characters you intend to store? 3. The array name without an index is a pointer constant. What does the name of a char array point to? 4. What are the two main ways to initialize a C-style string? What is a common mistake when using the initializer list method, and what is its consequence? 5. Why is it necessary to add _CRT_SECURE_NO_WARNINGS to the preprocessor definitions in Visual Studio when working with many standard C library functions?
What is the alternative approach? 6. What is the key difference between stropy and strncpy? Why might strncpy be considered safer? 7. How does the stremp function determine if one string is "less than" another? Why can't you use the == operator to compare two C-style strings for content equality? 8. Describe the purpose and parameters of the strok function. How do you get all tokens from a string? 9. What do the functions strchr and strrchr do? How do they differ? 10. Explain what the strstr function returns and what it is commonly used for. 11. What is the purpose of the functions in the < cctype> header? Give three examples of such functions and their use. 12. What is the difference between tolower(c) and_tolower(c)? When should you use each? 1. What is a function in C++? Name the three core benefits of using functions in a program. 2. What is the difference between a function declaration (prototype) and a function definition? Provide examples. 3. What is a function signature? Which elements are part of the signature, and which are not? 4. What methods of passing parameters to a function do you know? Explain the difference between pass-by-value, pass-by-pointer, and pass-by-reference. 5. Why can't you pass an array to a function by value? What is the correct way to pass an array to a function? 6. What is variable scope? How is it related to functions? 7. How does a function return a value? What happens if a function with a non-void return type does not return a value on all control paths? 8. Can you use multiple return statements in a single function? Provide an example. 9. What is function overloading? What is it based on? 10. How is interaction between functions organized in a program? Provide an example program with several functions. 11. What are default parameters? How are they specified, and in what cases are they useful? 12. How can you prevent a function from modifying the data passed to it? What modifiers are used for this? 13. What is recursion? Provide an example of a recursive function. 14. What common errors occur when working with functions? How can they be avoided? 15. How do you use pointers to functions? Provide an example of declaring and calling a function through a pointer. 用中文回答
11-18
std::cout << "He said: \"The file is in C:\\\\Users\\\"\n"; ``` 说明：双引号用 `\"`，反斜杠用 `\\\\`（在字符串中一个 `\` 需写两次）。 --- ### 4. 是否可以用一条 `std::cout` 语句输出多行文本？如果可以...
1. List the six main biwise operators in C++ and explain the function of each. 2. Why cannot bitwise operations be applied to variables of floating-point type? 3. Explain the purpose of the << (left shift) and >> (right shift) operators. What is the typical effect on the decimal value of a number when it is shifted left by 1? Shifted right by 1? 4. Describe the process of using a mask to check the value of a specific bit within an
integer. 5. How can you use the bitwise AND operator (&) to check if a number is even or odd?
Explain the logic. 6. What is the difference between the logical AND (&&) and the bitwise AND (&)? Provide an example scenario for each. 7. Explain the purpose of the ~ (bitwise NOT) operator. What is the result of applying it to a mask, and how can this be useful? 1. What is the primary goal of program debugging? What types of errors can it help identify? 2. Describe the difference between Step Over (F10) and Step Into (F11) debugging commands. When would you choose one over the other? 3. What is the purpose of a breakpoint in planned debugging? How do you set and remove a breakpoint in Visual Studio? 4. Explain the utility of the "Watch" window compared to the "Autos" or "Locals" windows during a debugging session. 5. What is the key difference between the Debug and Release configurations when building a project? Why is it necessary to create a Release version after successful debugging? 6. List at least three types of files commonly found in a project's Debug folder and briefly state their purpose (e.g., *.pdb). 7. During debugging, you notice a variable has an incorrect value. How can you change its value during runtime to test a hypothesis without modifying the source code? 8. What command is used to exit the debug mode and stop the current debugging session? 1. What is an array in C++? List its three main characteristics. 2. How are array elements numbered in C++? What is the valid index range for an array declared as int data[25];? 3. Explain the difference between array declaration and initialization. Provide an example of each. 4. What is an initializer list? What happens if the initializer list is shorter than the array size? 5. How can you let the compiler automatically determine the size of an array during initialization? 6. What values do elements of a local array contain if it is declared but not explicitly initialized? How does this differ from a global array? 7. What is an array out-of-bounds error? Why is it dangerous, and what are its potential consequences? 8. How do you calculate the number of elements in an array using the sizeof operator?
Provide the formula. What is a significant limitation of this method? 9. Why is it impossible to copy the contents of one array into another using the assignment
operator (arrayB = arrayA;)? What is the correct way to perform this operation? 10. Why does comparing two arrays using the equality operator (arrayA == arrayB) not check if their elements are equal? How should array comparison be done correctly? 11. What does the name of an array represent in terms of memory? 1. What is a pointer in C++ and what are its two main attributes? 2. Explain the difference between the & and * operators when working with pointers. 3. Why is pointer initialization critical and what dangers do uninitialized pointers pose? 4. What is the fundamental relationship between arrays and pointers in C++? 5. How does pointer arithmetic work and why does ptr + 1 advance by the size of the pointed type rather than 1 byte? 6. What is the difference between an array name and a pointer variable? Why can't you increment an array name? 7. What are the differences between const int*, int* const, and const int* const? 8. How can you safely iterate through an array using pointers, and what are the boundary risks? 9. What is a null pointer and why should you check for nullptr before dereferencing? 10. How do you access array elements using pointer syntax, and how does the compiler translate arr[i] internally? 1. What is a multidimensional array? How is a two-dimensional array structured in memory? 2. Explain the concept of an "array of arrays". How does this relate to the declaration int arr/ROWS//COLS;? 3. The name of a two-dimensional array without indices is a pointer constant. What does this pointer point to? What do the expressions *(A + i) and *(*(A + i) +j) mean for a two-dimensional array A? 4. Describe the different ways to access the element A/1/[2/ of a two-dimensional array
using pointers. 5. What is the rule for omitting the size of dimensions when initializing and when passing a multidimensional array to a function? Why is it allowed to omit only the first dimension? 6. Explain the principle of "row-major order" for storing two-dimensional arrays in memory.
How does this affect element access? 7. Why are nested loops the standard tool for processing multidimensional arrays?
Describe the typical pattern for iterating through a matrix. 1. How is a character string stored in memory in C++? What is the role of the null terminator (10), and why is it critical for C-style strings? 2. Why must the size of a char array declared to hold a string be at least one greater than the number of characters you intend to store? 3. The array name without an index is a pointer constant. What does the name of a char array point to? 4. What are the two main ways to initialize a C-style string? What is a common mistake when using the initializer list method, and what is its consequence? 5. Why is it necessary to add _CRT_SECURE_NO_WARNINGS to the preprocessor definitions in Visual Studio when working with many standard C library functions?
What is the alternative approach? 6. What is the key difference between stropy and strncpy? Why might strncpy be considered safer? 7. How does the stremp function determine if one string is "less than" another? Why can't you use the == operator to compare two C-style strings for content equality? 8. Describe the purpose and parameters of the strok function. How do you get all tokens from a string? 9. What do the functions strchr and strrchr do? How do they differ? 10. Explain what the strstr function returns and what it is commonly used for. 11. What is the purpose of the functions in the < cctype> header? Give three examples of such functions and their use. 12. What is the difference between tolower(c) and_tolower(c)? When should you use each? 1. What is a function in C++? Name the three core benefits of using functions in a program. 2. What is the difference between a function declaration (prototype) and a function definition? Provide examples. 3. What is a function signature? Which elements are part of the signature, and which are not? 4. What methods of passing parameters to a function do you know? Explain the difference between pass-by-value, pass-by-pointer, and pass-by-reference. 5. Why can't you pass an array to a function by value? What is the correct way to pass an array to a function? 6. What is variable scope? How is it related to functions? 7. How does a function return a value? What happens if a function with a non-void return type does not return a value on all control paths? 8. Can you use multiple return statements in a single function? Provide an example. 9. What is function overloading? What is it based on? 10. How is interaction between functions organized in a program? Provide an example program with several functions. 11. What are default parameters? How are they specified, and in what cases are they useful? 12. How can you prevent a function from modifying the data passed to it? What modifiers are used for this? 13. What is recursion? Provide an example of a recursive function. 14. What common errors occur when working with functions? How can they be avoided? 15. How do you use pointers to functions? Provide an example of declaring and calling a function through a pointer.用中文解答，每个问题重复一遍题目
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1. 列出C++中的六个主要位运算符，并解释每个的功能。 **题目重述** 列出C++中六个主要的位运算符并说明其功能。 **详解** C++中的六个主要位运算符如下： - `&`（按位与）：对应位都为1时结果为1。...
android 屏幕横竖屏切换时生命周期运行详解，创建横屏layout，has no declaration in the base
meixi_android的博客
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横屏代码 setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);//hp 竖屏代码 setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);//sp activity生命周期变化 &l...
The layout <layout> in layout has no declaration
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安卓开发。 当你创建一个布局文件ABCD.XML 报错The layout <layout> in layout has no declaration 时。 把你的 布局文文件名字全改为小写就可以了 abcd.xml 。 。。。。。 ...
The layout “xxx“ in layout has no declaration in the base layout folder； this can lead to crashes wh
qq_40757384的博客
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The layout “xxx” in layout has no declaration in the base layout folder; this can lead to crashes when the resource is queried in a configuration that does not match this qualifier. 译文：布局中的“xxx”在基本布局文件夹中没有声明;当在不匹配此限定符的配置中查询资源时，这可能会导致崩溃。 解决方式：重启android stud
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在Module里创建colors.cml文件报错 报错信息 The color “tran_black” in values has no declaration in the base values folder; this can lead to crashes when the resource is queried in a configuration that does not ma...
the color in values has no declaration in the base value floder
qq906786621的专栏
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the color in values has no declaration in the base value floder 是因为在 settings.gradle 里面将这个模块删掉了。
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Android studio版本: 3.5.2 API 30 问题 在使用okhttp+gson请求网络数据并解析的时候,请求解析失败:部分报错信息如下: qemu_pipe_open_ns: Could not connect to the ‘pipe:qemud:network’ service: Invalid argument RemoteConnection failed to initialize: RemoteConnection failed to open pipe 无法打开QEMU管.
net:ERR_CLEARTEXT_NOT_PERMITTED错误四种解决办法
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最近项目开发时候遇到了这样一个问题，同样的布局内容，一个没问题另一个就报这个错误。在网上搜索尝试了几个方法之后，最终得出结论。重启Android Studio可以解决！
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翻译： XML声明中“version”后面的值必须是一个带引号的字符串。 于是乎：将 <?xml version=1.0 encoding=utf-8 ?> 修改为 <?xml version='1.0' encoding='utf-8' ?> ...
在安卓中出现The layout activity _ main in layout-land has no declaration in the base layout` folder; t
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<think>嗯，我现在遇到了一个安卓开发的问题，错误信息是说“The layout activity_main in layout-land has no declaration in the base layout folder”。这个问题看起来和布局文件有关，但具体是怎么回事呢？我得仔细想想。 首先，用户提到的错误信息中提到了layout-land文件夹下的activity_main布局没有在基础layout文件夹中声明。我记得安卓系统中，不同的布局文件夹是为了适配不同的屏幕方向或配置的，比如layout-land是横屏时的布局，layout-port是竖屏。而基础布局文件夹应该是layout，也就是默认的布局位置。 可能的问题是什么？根据错误信息，应该是当我在横屏的layout-land里放置了activity_main.xml，但是在默认的layout文件夹里却没有对应的activity_main.xml。安卓系统在加载布局时，可能会先检查基础布局是否存在，如果不存在，就会报这个错误。因为当设备方向改变时，系统会寻找对应的布局文件，但如果基础布局不存在，可能导致找不到默认的布局，从而报错。 那解决方案应该是确保在layout文件夹里有一个同名的activity_main.xml文件。也就是说，即使竖屏和横屏的布局不同，但至少基础布局必须存在。例如，可能用户只为横屏创建了布局，但竖屏没有对应的默认布局，这时候就会出错。 不过，用户可能希望横屏使用特定的布局，而竖屏使用另一个，或者两者共享同一个布局。这时候需要检查两个文件夹下是否存在同名的布局文件。如果用户确实需要不同的布局，应该在layout和layout-land中都放置activity_main.xml，即使内容不同。如果不需要不同的布局，只需要在layout文件夹中有一个，而删除layout-land中的文件，或者确保两个都存在。 另外，可能用户误将横屏布局放到了layout-land里，但忘记在基础布局中创建默认的。这时候需要检查项目结构，确认布局文件的位置是否正确，名字是否一致，包括大小写是否正确，因为有些系统是区分大小写的。 还有一种可能性是，用户可能在使用Android Studio时，错误地创建了布局文件夹或者命名了文件，导致系统无法正确识别。需要检查res目录下的布局文件夹结构，确保layout-land和layout都存在，并且各自的activity_main.xml正确无误。 总结一下，解决步骤应该是：首先检查layout和layout-land文件夹中是否都有activity_main.xml；如果没有，就在基础layout文件夹中创建该文件；如果不需要横屏特殊布局，可以删除layout-land中的文件；如果需要不同的布局，确保两个文件夹都有对应的文件，并且名字一致。同时，清理和重建项目可能有助于消除缓存带来的问题，如果问题依然存在，可能需要进一步检查XML文件中的内容是否有语法错误或其他问题。</think>在Android开发中，遇到错误提示 `The layout "activity_main" in layout-land has no declaration in the base layout folder` 表示您的横屏布局文件缺少对应的基础布局声明。以下是逐步分析和解决方案： --- ### **问题原因** 1. **布局文件夹规则** - `layout/`：默认布局文件夹（竖屏或其他未明确配置的情况）。 - `layout-land/`：横屏（Landscape）专用布局文件夹。 - **规则**：如果为横屏 (`layout-land/`) 定义了特定布局文件（如 `activity_main.xml`），则必须在基础 `layout/` 文件夹中也存在同名文件。 2. **错误本质** 您可能在 `layout-land/` 中创建了 `activity_main.xml`，但未在 `layout/` 中提供默认版本，导致系统找不到基准布局。 --- ### **解决方案** #### 方法1：补充基础布局文件 1. **在 `layout/` 中创建同名文件** - 右键 `res/layout/` 文件夹 → `New → Layout Resource File`，输入文件名 `activity_main.xml`。 - 编写默认布局内容（即使与横屏布局不同）。 2. **检查文件名一致性** - 确保横屏 (`layout-land/activity_main.xml`) 和基础 (`layout/activity_main.xml`) 的文件名 **完全一致**（包括大小写）。 --- #### 方法2：删除冗余的横屏布局（若不需要） - 如果不需要为横屏单独设计布局，直接删除 `layout-land/activity_main.xml`，系统会自动使用 `layout/activity_main.xml` 适配所有方向。 --- #### 方法3：同步布局内容（可选） - 若横屏布局需复用基础布局的部分内容，可通过 `<include>` 标签复用组件： ```xml <!-- layout-land/activity_main.xml --> <LinearLayout ...> <include layout="@layout/activity_main_base" /> <!-- 横屏特有组件 --> </LinearLayout> ``` --- ### **验证步骤** 1. **清理项目** 点击 Android Studio 菜单栏的 `Build → Clean Project`，然后 `Rebuild Project`，确保无缓存问题。 2. **检查文件夹结构** 确认 `res/` 目录结构如下： ``` res/ ├── layout/ │ └── activity_main.xml └── layout-land/ └── activity_main.xml ``` 3. **模拟设备测试** 运行应用后旋转设备，观察横竖屏切换是否正常。 --- ### **常见陷阱** - **文件名拼写错误**：如 `activity_main.xml` 与 `Activity_main.xml` 会被视为不同文件。 - **XML语法错误**：检查两个布局文件的标签是否闭合，避免因语法错误导致加载失败。 - **未声明Activity关联**：确保 `AndroidManifest.xml` 中对应的 Activity 正确设置了 `android:name`。 --- 通过以上步骤，您应能修复布局声明缺失的问题。若仍存在问题，建议检查布局文件内容或提供更多代码片段进一步分析。
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