51.比较字符串长短

给定程序中，函数fun的功能是：比较两个字符串，将长的那个字符串的首地址作为函数返回值。

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
char *fun(char *s, char *t)
{
	int s1 = 0, t1 = 0;
	char *ss, *tt;
	ss = s;
	tt = t;
	while (*ss)
	{
		s1++;
		ss++;
	}
	while (*tt)
	{
		t1++;
		tt++;
	}
	if (t1 > s1)
		return t;
	else
		return s;
}
int main()
{
	char a[80], b[80];
	printf("\nEnter a string: ");
	gets(a);
	printf("\nEnter s string again:");
	gets(b);
	printf("\nThe longer is:\n\"%s\"\n", fun(a, b));
	getchar();
	return 0;
}