sunyujia19的专栏

Subsections What is a Pointer?Pointer and FunctionsPointers and ArraysArrays of PointersMultidimensional arrays and pointersStatic Initialisation of Pointer ArraysPointers and StructuresCommon Poin

#if 0 #endif

f (int &a) 引用类型   引用传递 f (int *a) 指针类型 （int *指向int型变量的指针类型）值传递 在函数里面改变函数外面变量的值 1：void f(int &a) { a=4; return; } 主函数中：int x=0;     f(x); 结果 x=4 2：void f(int *a) { *a=4; return;

#define __STDC_FORMAT_MACROS #include #include int main(){ uint64_t ui64 = 64; uint32_t ui32 = 32; uint16_t ui16 = 16; printf("test uint64_t : %" PRIu64 "\n", ui64);

定义data structure时定义成员变量的bit宽度 typedef struct example_s { unsigned int data1 : 1; unsigned int data2 : 2; }example_t; 参考 http://www.tutorialspoint.com/cprogramming/c_bit_fields.htm

can define the data structure in one header, initialize in another one can include header files like this or include both headers in source file without including test_define.h in test_ini.h. but ext

1) sort by key: using function pointer bool key_compare(int a, int b){ return (a > b); } int main() { bool(*fn_cmp)(int, int) = key_compare; map m(fn_cmp); } 2) sort by value: http://w

C++: int Number = 123; string String = static_cast( &(ostringstream() str(); std::string s = std::to_string(42);