判断今天是一周的第几天

#include<stdio.h>
void judge(int days);
int main()
{
    int days;
    printf("请输入今天是一周的第几天:\n");
    scanf("%d",&days);
    judge(days);
    getchar();
    getchar();
    return 0;
}
void judge(int days)
{
    switch(days)
        {
            case 1:printf("周一");break;
            case 2:printf("周二");break;
            case 3:printf("周三");break;
            case 4:printf("周四");break;
            case 5:printf("周五");break;
            case 6:printf("周六");break;
            case 7:printf("周日");break;
            default:printf("输入错误,请重新输入：");
                scanf("%d",&days);judge(days);break;
        }

}