1.判断二个字符串是否相等,可以模仿strcmp.当二个字符串相等的时候ruturn 0.,当二个字符串小于时返回为小于0,当二个字符串大于时返回为大于0。const为不可以更改。
//方法一
int my_strcmp(const char* arr1, const char* arr2)
{
assert(arr1 &&arr2);
while (*arr1==*arr2)
{
if (*arr1 == '\0')
{
return 0;
}
*arr1 ++ ;
*arr2++;
}
return (*arr1 - *arr2);
}
int main()
{
char arr1[20] = { "zhangsan" };
char arr2[20] = { "zhangsana" };
int ret=my_strcmp(arr1, arr2);
if (ret == 0)
printf("==\n");
if (ret<0)
{
printf("<\n");
}
if (ret > 0)
{
printf(">\n");
}
return 0;
}
标签:二个,char,arr2,arr1,字符串,strcmp
From: https://blog.csdn.net/scy2429828663/article/details/140877589