the macro of watch variable value and its memory content

最新推荐文章于 2022-03-02 23:12:06 发布

原创最新推荐文章于 2022-03-02 23:12:06 发布 · 527 阅读

0 ·

CC 4.0 BY-SA版权

C/C++ 专栏收录该内容

97 篇文章

订阅专栏

本文提供了一个C语言代码示例，展示了如何使用宏定义来监视变量的值和内存地址，包括整型和浮点型变量。

//replace the printf() with your log function

#include "stdafx.h"
#include <stddef.h>

typedef int INT;
typedef unsigned char BYTE;
typedef short SHORT;

#define WatchVarVal(fmt, Var) { \
printf(#Var##" value: "##fmt##"\n", Var); \
}

// the local variable _i must be different from the input argument Var in this macro,otherwise error will occur.

#define WatchVarMem(Var) { \
int _i; \
printf(#Var##" addr: 0x%x"##", size: %d bytes\n", &Var, sizeof(Var)); \
for(_i = 0; _i < sizeof(Var); _i++) \
printf("Byte[%d]:0x%x\n", _i, *((unsigned char *)&Var + _i)); \
}

int _tmain(int argc, _TCHAR* argv[])
{
INT iVar = 1023;
double dblVar = 2.34567;

WatchVarVal("%d", iVar);
WatchVarMem(iVar);

WatchVarVal("%f", dblVar);
WatchVarMem(dblVar);

getchar();
return 0;
}