很简单的数学题，进行简单答题

输入某年某月，判断这一天是这一年的第几天？
从键盘输入年月日
输出格式为xx年xx月xx日是该年的第xx天
需用到switch函数
用两种方法完成

C++算法一阶段-一年的第几天和排序-（贰）_Gao996的博客-CSDN博客 一年的第几天题目地址 Python 练习实例4题目：输入某年某月某日，判断这一天是这一年的第几天？#include "myhead.h"int month[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};int main(){int y, m, d, sum = 0;cin>>y>>m>>d;if (isLeapYear(y)){month[1]++;}for (in https://blog.csdn.net/qq_41863100/article/details/122120992

https://leetcode-cn.com/problems/day-of-the-year/solution/yi-nian-zhong-de-di-ji-tian-by-leetcode-2i0gr/

#include
using namespace std;
void main()
{
int a, b, c, d;
cout << "请输入年，月，日" << endl;
cin >> a >> b >> c;
d = 0;
switch (b)
{
case 12:d = d + c + 30;
case 11:d = d + c + 31;
case 10:d = d + c + 30;
case 9:d = d + c + 31;
case 8:d = d + c + 31;
case 7:d = d + c + 30;
case 6:d = d + c + 31;
case 5:d = d + c + 30;
case 4:d = d + c + 30;
case 3:
if ((a % 4 == 0 && a % 100 != 0) || (a % 400 == 0))
d = d + c + 29;
else
d = d + c + 28;
case 2:d = d + c + 31;
case 1:d = d + c;
}
cout << "为这一年的第" << d << "天" << endl;
}