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<>strcmp函数使用说明
* strcmp函数是专门用来字符串之间的的比较的
这个比较是比较两个字符串是否相同,如果不相同那就比较两个字符串的长度大小。
从图中可以看出strcmp函数的参数是两个字符串,返回值为整形。
* 这个返回值也是有讲究的
每个函数的返回值表示字符串1到字符串2的字典关系
如果字符串1与字符串2一模一样则返回值为0
如果字符串不一样,并且字符串1>字符串2,则返回值>0.相反返回值小于零。
可以根据简单的例子来理解: int main() { char string1[] = "abc"; char string2[] = "abc";
char string3[] = "bcde"; int a, b,c; a = strcmp(string1, string2); b = strcmp(
string1, string3); c = strcmp(string3, string1); printf("%d %d %d", a, b,c);
return 0; }
可以看出字符串1大于字符串2的话返回值是>0而这个值正好是1 相反是-1;
* 头文件:
strcmp库函数使用前要引用头文件<string.h>