IAR在线调试时用DEBUG打印调试信息

#include "stdafx.h"
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

//是否开启DEBUG模式
//#define _DEBUG_ 0    //不开启
#define _DEBUG_ 1    //开启
#if _DEBUG_
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif

int main()
{
	int a, b, c;
	b = 1;
	c = 2;
	a = b + c;
	PRINTF("a = %d\n", a);
	getchar();
        return 0;
}