(c语言）比较两个字符串的长度

#include <stdio.h>

 

#define N 100

 

void input( char *a, char *b )                   //输入两个字符串

{

    printf("Input the first information:\n");

    fgets(a,N,stdin);

    printf("Input the secend information:\n");

    fgets(b,N,stdin);

}

 

int my_strlen( char *a, char *b )                //比较两个字符串的长短

{

    int i = 0;

    int len1 = 0;

    int len2 = 0;

 

    while( *a != '\n' )                          //求字符串的长度   

    {

        len1++;

a++;

    }

 

    while( *b != '\n')                           //求字符串的长度

    {

        len2++;

b++;

    }

 

    if( len1 != len2 )                           //比较字符串的长度

    {

        return -1;

    }

 

    while( *a != '\n' )                          //比较两个字符串是否相等

    {

        if( *a != *b )

        {

            return -1;

}

    }

 

    return 0;

}

 

 

int main()

{   

    char a
= {0};

    char b
= {0};

    int net = 0;

 

    input(a,b);                                  //调用输入函数

    net = my_strlen(a,b);                        //调用比较函数

       

    if( 0 == net)                                //输出是否相等

    {

        printf("yes!\n");

    }

    else

    {

        printf("no!\n");

    }

 

    return 0;

}