习题11-2 查找星期 (15分)

本题要求实现函数，可以根据下表查找到星期，返回对应的序号。

序号	星期
0	Sunday
1	Monday
2	Tuesday
3	Wednesday
4	Thursday
5	Friday
6	Saturday

函数接口定义：

int getindex( char *s );

函数getindex应返回字符串s序号。如果传入的参数s不是一个代表星期的字符串，则返回-1。

裁判测试程序样例：

#include <stdio.h>
#include <string.h>

#define MAXS 80

int getindex( char *s );

int main()
{
    int n;
    char s[MAXS];

    scanf("%s", s);
    n = getindex(s);
    if ( n==-1 ) printf("wrong input!\n");
    else printf("%d\n", n);

    return 0;
}

/* 你的代码将被嵌在这里 */

输入样例1：

Tuesday

输出样例1：

2

输入样例2：

today

输出样例2：

wrong input!

解答：

int getindex(char *s)
{
	int week;
	char *day[7] = { "Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday" };
    for (week = 0; week <= 6; week++){
		if (strcmp(s, day[week]) ==0) break;
	}
	
	if (week == 7) week = -1;
	
	return week;
}