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C language strcmp function usage

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2020-07-30 10:20:184688browse

C language strcmp function usage

C语言strcmp函数用法

strcmp函数语法为“int strcmp(char *str1,char *str2)”,其作用是比较字符串str1和str2是否相同,如果相同则返回0,如果不同,前者大于后者则返回1,否则返回-1。

简单示例

char a[]="abcd";
char *b="abcd";
char *d="abcde";
int d=strcmp(a,b); //那么d的值是0
d=strcmp(b,d); //d的值是-1 因为 '\0' 比'e' 小
d=strcmp(d,b); //d的值是1,因为 'e' 比'\0'大
#include <stdio.h>
#include <string.h>

int main(){
    char str1[50] = { 0 };
    char str2[50] = { 0 };
    int i = 1;

    do {
        printf("******第%d次输入******\n", i);
        gets(str1);
        gets(str2);
        i++;
    } while ( strcmp(str1, str2) );

    return 0;
}

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