C语言完整代码星期几换算

以下是C语言完整代码，用于将给定日期转换为星期几：

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int year, month, day;
    printf("请输入日期（格式：年-月-日）：");    scanf("%d-%d-%d", &year, &month, &day);

    if (month == 1 || month == 2) {
        month += 12;
        year--;
    }

    int week = (day + 2 * month + 3 * (month + 1) / 5 + year + year / 4 - year / 100 + year / 400) % 7;

    switch (week) {
        case 0:
            printf("星期日\n");
            break;
        case 1:
            printf("星期一\n");
            break;
        case 2:
            printf("星期二\n");
            break;
        case 3:
            printf("星期三\n");
            break;
        case 4:
            printf("星期四\n");
            break;
        case 5:
            printf("星期五\n");
            break;
        case 6:
            printf("星期六\n");
            break;
    }

    return 0;
}