C language simulation to realize strcmp function

analyze

Implement strcmp(str1, str2)
strcmp() string comparison function

#include<stdio.h>
#include<stdlib.h>
#include<assert.h>
int  my_strcmp( const char* str1,const char* str2)
{
    assert(str1!=NULL);
    assert(str2!=NULL);
    while(*str1== *str2)
    {
        if(*str1=='\0')
        {
            return 0;
        }
        str1++;
        str2++;
    }
    return *str1-*str2;
}

test section

int main()
{
    char *p="aaaaaaa ";
    char *q="aaabaaa";
    int ret = my_strcmp(p,q);
    printf("%d\n",ret);
    system("pause");
    return 0;

}

operation result