#include<stdio.h>
#include <string.h> int mystrcmp(char * p1,char * p2)
{
int ret=0;
if(p1!=NULL||p2!=NULL)
{
while(*p1==*p2)
{
p1++;
p2++;
}
if(*p1!=*p2)
{
ret=*p1-*p2;
}
}
return ret;
} int main()
{
char * p1="helloworld";
char * p2="hellowerld";
int ret=strcmp(p1,p2);
int ret2=mystrcmp(p1,p2);
if(ret==0||ret2==0)
{
printf("p1==p2\n");
}
else if(ret>0||ret2>0)
{
printf("p1>p2\n");
}
else if(ret<0||ret2<0)
{
printf("p1<p2\n");
}
return 0;
}
输出结果:
p1>p2