C语言实现枚举类型星期：不用switch语句

#include <stdio.h>

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

int main()
{
    int day;
    printf("请输入1-7之间的整数：");
    scanf("%d", &day);

    if (day == Sunday) {
        printf("星期日\n");
    } else if (day == Monday) {
        printf("星期一\n");
    } else if (day == Tuesday) {
        printf("星期二\n");
    } else if (day == Wednesday) {
        printf("星期三\n");
    } else if (day == Thursday) {
        printf("星期四\n");
    } else if (day == Friday) {
        printf("星期五\n");
    } else if (day == Saturday) {
        printf("星期六\n");
    } else {
        printf("输入错误！\n");
    }

    return 0;
}