#ifdef _DEBUG

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于 2019-12-24 11:52:02 发布

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#ifdef _DEBUG
#endif
这是条件编译，即如果有#define _DEBUG这两个函数会编译，否则忽略，
当你用debug生成时（相对于release）开发环境则自动的加上这个宏定义，这两个函数有效。

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vc6.0出现无法解析错误
2301_80704401: 这种怎么解决啊（纯小白）
c，C++语言中、\t \r \n 和空格什么意思
留白工作室: 部分变量类型可能需要这个头文件 [code=cpp] #include <bits/stdc++.h> [/code]
c，C++语言中、\t \r \n 和空格什么意思
留白工作室: 仅供参考
c，C++语言中、\t \r \n 和空格什么意思
留白工作室: [code=cpp] //double cout << "double: \t" << "所占字节数:" << sizeof(double); cout << "\t最大值:" << (numeric_limits<double>::max)(); cout << "\t最小值:" << (numeric_limits<double>::min)() << endl; //long double cout << "long double: \t" << "所占字节数:" << sizeof(long double); cout << "\t最大值:" << (numeric_limits<long double>::max)(); cout << "\t最小值:" << (numeric_limits<long double>::min)() << endl; //float cout << "float: \t\t" << "所占字节数:" << sizeof(float); cout << "\t最大值:" << (numeric_limits<float>::max)(); cout << "\t最小值:" << (numeric_limits<float>::min)() << endl; //size_t cout << "size_t: \t" << "所占字节数:" << sizeof(size_t); cout << "\t最大值:" << (numeric_limits<size_t>::max)(); cout << "\t最小值:" << (numeric_limits<size_t>::min)() << endl; //string cout << "string: \t" << "所占字节数:" << sizeof(string) << endl; //string没有上限和下限 cout << "\n各种类型: \t\t" << "************size**************\n"<< endl << (char) 7; [/code]
c，C++语言中、\t \r \n 和空格什么意思
留白工作室: [code=cpp] //short cout << "short: \t\t" << "所占字节数:" << sizeof(short); cout << "\t最大值:" << (numeric_limits<short>::max)(); cout << "\t\t最小值:" << (numeric_limits<short>::min)() << endl; //int cout << "int: \t\t" << "所占字节数:" << sizeof(int); cout << "\t最大值:" << (numeric_limits<int>::max)(); cout << "\t最小值:" << (numeric_limits<int>::min)() << endl; //unsigned cout << "unsigned: \t" << "所占字节数:" << sizeof(unsigned); cout << "\t最大值:" << (numeric_limits<unsigned>::max)(); cout << "\t最小值:" << (numeric_limits<unsigned>::min)() << endl; //long cout << "long: \t\t" << "所占字节数:" << sizeof(long); cout << "\t最大值:" << (numeric_limits<long>::max)(); cout << "\t最小值:" << (numeric_limits<long>::min)() << endl; //unsigned long cout << "unsigned long: \t" << "所占字节数:" << sizeof(unsigned long); cout << "\t最大值:" << (numeric_limits<unsigned long>::max)(); cout << "\t最小值:" << (numeric_limits<unsigned long>::min [/code]