startswitht和endwhith函数实现

#include<stdio.h>
#include<string.h>
#define FAILE 1
#define SUCCESS 0
#include<assert.h>
 int startswith(char *lhs, char * rhs)
{
    assert(lhs!=NULL);
    assert(rhs!=NULL);
    while(* rhs)
    {
	if(*rhs++ != *lhs++)
	    return FAILE;
	else
	    return SUCCESS;
    }
}
 int endswith(char* lhs, char* rhs)
{
    assert(lhs!=NULL);
    assert(rhs!=NULL);
    lhs += strlen(lhs);
    rhs += strlen(rhs);
    while(*(--rhs))
	if((*rhs) != *(--lhs))
	    return FAILE;
	else
	    return SUCCESS;
}
int main()
{
    char *s1 = "helloword";
    char *s2 = "word";
    char *s3 = "hello";

    printf("%d\n",startswith(s1,s3));
    printf("%d\n",endswith(s1,s2));
    return 0;

}