写日志

#include <stdio.h>

#define D(...) \

do { \

FILE *fp = fopen("/tmp/log.txt","a"); \

fprintf(fp,"%s:%s:%d:\t", __FILE__, __func__, __LINE__); \

fprintf(fp,__VA_ARGS__); \

fprintf(fp,"\n"); \

fclose(fp); \

} while (0);