每日一题3.19
题目描述:输入一个日期,年 月 日,输出这个日期是今年的第多少天
解题思路: 用两个数组存放平年和闰年各个月份的天数,判断平年与闰年,再把天数加到月份的前一个月,最后加上日期中的日
代码实现:
#include <iostream>
using namespace std;
int main()
{
int y, m, d;
while (cin >> y >> m >> d)
{
if (m > 12 || m < 0)
{
cout << -1 << endl;
return -1;
}
int leapyear[] = { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
int commonyear[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
int day = 0;
if (y % 4 == 0 && y % 100 != 0 || (y % 400 == 0))
{
if (d>leapyear[m] || d < 0)
{
cout << -1 << endl;
return -1;
}
for (int i = 1; i < m; i++)
{
day += leapyear[i];
}
day += d;
cout << day << endl;
}
else
{
if (d>commonyear[m] || d < 0)
{
cout << -1 << endl;
return -1;
}
for (int i = 1; i < m; i++)
{
day += commonyear[i];
}
day += d;
cout << day << endl;
}
}
system("pause");
return 0;
}
参考答案: