求某个月天数 我已经挂了

Question

Answer 1

#include <stdio.h>
int ruinian(int year); // 声明一个判断某年是否是闰年的函数
int main()
{
    int year, month;
    printf("请输入年月日，例如：2012.02:");
    scanf("%d.%d", &year, &month);
    if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)
        printf("%d年%d月有31天。\n", year, month);
    else if (month == 4 || month == 6 || month == 9 || month == 11)
        printf("%d年%d月有30天", year, month);
    else if (month == 2)
        if (ruinian(year) == 1)
            printf("%d年%d月有29天\n", year, month);
        else
            printf("%d年%d月有28天\n", year, month);
    else
        printf("你输入的格式或者月份有错误，请从新输入：\n");
    return 0;
}
int ruinian(int n)
{
    if (((n % 100 != 0) && (n % 4 == 0)) || (n % 400 == 0))
        return 1;
    else
        return 0;
}