C语言枚举类型实现星期几转换

#include <stdio.h>

enum WEEKDAY {Sunday = 1, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday};

int main() {
    int num;
    printf('请输入1~7的整数：');
    scanf('%d', &num);
    switch (num) {
        case Sunday:
            printf('星期日\n');
            break;
        case Monday:
            printf('星期一\n');
            break;
        case Tuesday:
            printf('星期二\n');
            break;
        case Wednesday:
            printf('星期三\n');
            break;
        case Thursday:
            printf('星期四\n');
            break;
        case Friday:
            printf('星期五\n');
            break;
        case Saturday:
            printf('星期六\n');
            break;
        default:
            printf('输入有误！\n');
            break;
    }
    return 0;
}