各位大哥大姐帮小弟做一个C语言程序,救命啊!

#include<stdio.h>
#include<windows.h>

int month_day[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};

int CallWeek(int year, int month, int day); //计算某年某月某日是星期几
int CheckYearMonthDay(int year, int month, int day); //检查年-月-日是否有效
void ShowCalendar(int week, int month, int day);

void main()
{
// int week;
int year;
int month;
int day;
for(;;)
{
system("cls");
printf("请输入查询的日期(年-月-日):");
scanf("%d-%d-%d", &year, &month, &day);
if(CheckYearMonthDay(year, month, day))
{
printf("日期输入错误\n");
}
else
{
// week = CallWeek(year, month, day);
// printf("%s\n", WEEK[week]);
ShowCalendar(CallWeek(year, month, day), month, day);
}
system("pause");
}
}
//*************start CheckYearMonthDay()***************//
int