输入月份判断天数

代码要求

• 判断闰年
• 判断大小月
• 使用switch（我觉得没必要）

代码实现

#include <stdio.h>

int main()
{
    int year, month, day;
    int big=31, small=30, two29=29, two28=28;
    printf("Please Input the Date:");
    scanf("%d-%d", &year, &month);
    switch (month) {
        case 1:
            printf("%d days", big);
            break;
        case 2:
            printf("%d days", (year%4==0&&year%100!=0) || year%400==0 ? two29 : two28);
            break;
        case 3:
            printf("%d days", big);
            break;
        case 4:
            printf("%d days", small);
            break;
        case 5:
            printf("%d days", big);
            break;
        case 6:
            printf("%d days", small);
            break;
        case 7:
            printf("%d days", big);
            break;
        case 8:
            printf("%d days", big);
            break;
        case 9:
            printf("%d days", small);
            break;
        case 10:
            printf("%d days", big);
            break;
        case 11:
            printf("%d days", small);
            break;
        case 12:
            printf("%d days", big);
            break;
        default:
            printf("Input error!\n");
    }
    return 0;
}

亮点！！！

我第一次使用了三目运算符！！！

见第14行代码：

printf("%d days", (year%4==0&&year%100!=0) || year%400==0 ? two29 : two28);

实现判断闰年并同时输出2月的天数

备注

这是我第一反应想写的代码：

#include <stdio.h>

int main()
{
    int year, month, day;
    int big = 31, small = 30, two29 = 29, two28 = 28;
    printf("Please Input the Date:");
    scanf_s("%d-%d", &year, &month);
    if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
        printf("%d days", big);
    }
    else if (month == 4 || month == 6 || month == 9 || month == 11) {
        printf("%d days", small);
    }
    else if (month == 2) {
        if (year % 4 == 0 && year % 100 != 0) {
            printf("%d days", two29);
        }
        else
        {
            printf("%d days", two28);
        }
    }
    else {
        printf("Input error!\n");
    }
}

确实。可读性没有用switch那么高.