assert使用

多用assert，能很好找到程序出错位置。
// assert.c#include <stdio.h>#include <stdlib.h>#include <string.h>/* 断言。当f为假时，输出当前断言的表达式，及代码所在位置的信息（函数名、源文件名、行号），并退出程序，返回-1。 */#define ASSERT()/printf("__funtion__:%s(), __file__:%s, __line__:%d/n",__func__,__FILE__,__LINE__)#define ASSERT_MSG(f,msg) /if (!(f)){ /printf("***ERROR***(%s): /"%s/" must be true, __funtion__:%s(), __file__:%s, "/"__line__:%d/n",msg,#f,__func__,__FILE__,__LINE__); /exit(-1); /}#define ASSERT_MSG_FMT(f,fmt,args...) /if (!(f)){ /printf("***ERROR***: /"%s/" must be true, __funtion__:%s(), __file__:%s, "/"__line__:%d/n",#f,__func__,__FILE__,__LINE__); /printf(fmt,##args);/printf("/n");/exit(-1); /}/** 注意，如果上面换行时，不多加两个引号，则输出时，下一行前面的空格也行被输出。 */void fun(char* str1,char* str2){//ASSERT();ASSERT_MSG(!strcmp(str1,str2),"the two string isn't equal");}/*** 判断输入两个参数是否相等*/int main(int argc,char *argv[]){printf("this is a test for assert，by yuanzhenhai/n");//ASSERT();ASSERT_MSG(argc == 3,"argc != 3"); fun(argv[1],argv[2]);printf("the two strings that you input is equal,successful!/n");return 0;}


测试
1、输入参数个数不等于2时
yuan@yuan:~/work/test> ./assert test
this is a test for assert，by yuanzhenhai
***ERROR***(argc != 3): "argc == 3" must be true, __funtion__:main(),  __file__:assert.c,  __line__:42

2、输入参数个数等于2，但两个参数字符串不相等时
yuan@yuan:~/work/test> ./assert test testtt
this is a test for assert，by yuanzhenhai
***ERROR***(the two string isn't equal): "!strcmp(str1,str2)" must be true, __funtion__:fun(),  __file__:assert.c,  __line__:32

3、输入参数个数等于2，两个参数字符串也相等时
yuan@yuan:~/work/test> ./assert test test
this is a test for assert，by yuanzhenhai
the two strings that you input is equal,successful!