c语..............

不用指针只用循环怎样去实现一个s
trcmp函数

int strcmp(char * s1,char *s2)
{
    int r=0;
    while(r==0)
    {
        r=*s1-*s2;
        if(!*s1 || !*s2 ) break;
        s1++;
        s2++;
    }
    
    return r;
}

int strcmp2(char s1[],char s2[])
{
    int r=0,i=0;
    while(r==0)
    {
        r=s1[i]-s2[i];
        if(!s1[i] || !s2[i] ) break;
        i++;
        
    }
    
    return r;
}