19.在指定的字符串数组中查找给定的字符串

给定程序中，函数fun的功能是：在形参ss所指字符串数组中查找与形参t所指字符串相同的串，找到后返回该字符串在字符串数组中的位置，未找到则返回-1，ss所指字符串数组中共有N个内容不同的字符串，且串长小于M。

#include<stdio.h>
#include<string.h>
#define N 5
#define M 8
int fun(char (*s)[M], char *t)
{
	int i;
	for (i = 0;i < N;i++)
		if (strcmp(s[i], t) == 0)
		return i+1;
	return -1;

}
int main()
{
	char ch[N][M] = { "if","while","switch","int","for" }, t[M];
	int n, i;
	printf("
The original string 

");
	for (i = 0;i < N;i++)
		puts(ch[i]);
	printf("
");
	printf("
Enter a string for search: ");
	gets(t);
	n = fun(ch, t);
	if (n == -1)
		printf("
Donot found!
");
	else
		printf("
The position is %d.
", n);
	getchar();
	return 0;
}