已知日期求星期的程序，利用蔡勒公式求解

Question

问题遇到的现象和发生背景

已知日期求星期的程序，利用蔡勒公式求解

用代码块功能插入代码，请勿粘贴截图

#include<stdio.h>
int main()
{ int year,month,day,a,b,c,d;
scanf("%d %d %d",&year,&month,&day);
a=year%10+year/10%10*10;
b=(year-year%10-year/10%10*10)/100;
if(month==1||month==2)
{
c=month+12;}
else
{
c=month;}
d=((a+a/4+b/4-2*b+(26*(c+1)))/10+day-1)%7;

printf("%d\n",d);
return 0;







}

运行结果及报错内容

with return value 3221225477

我的解答思路和尝试过的方法

搜的是出现野指针，但是不知道怎么改

Answer 1

供参考：

#include <stdio.h>
int Get_Week(int y, int m, int d)
{
    int week = -1;
    if (m == 1 || m == 2) {
        m += 12;  y--;
    }
    week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7;
    return week;
}
int main()
{
    int y, m, d;
    char* week[7] = { "Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday" };
    printf("请输入(年 月 日):");
    scanf("%d %d %d", &y, &m, &d);
    printf("%s", week[Get_Week(y, m, d)]);

    return 0;
}