给一个日期，判断它是周几

给一个日期，判断它是周几

依次输入年月日，并用空格隔开。

#include<stdio.h>
#include<string.h>
#include<math.h>
int dayofweek(int y, int m, int d)
{
    static int t[] = {0,3,2,5,0,3,5,1,4,6,2,4};
    y-= m<3;
    if((y+y/4-y/100+y/400+t[m-1]+d)%7==0)
        return 7;
    else
        return (y+y/4-y/100+y/400+t[m-1]+d)%7;
}
int main()
{
    int y,m,d;
    scanf("%d %d %d",&y,&m,&d);
    printf("%d",dayofweek(y,m,d));
    return 0;
}