9-题目1186：打印日期

http://ac.jobdu.com/problem.php?pid=1186

题目描述：

给出年分m和一年中的第n天，算出第n天是几月几号。

注意输出的时候printf("%04d-%02d-%02d\n", year,month,sum); 04d表示输出固定4个数字，若不满则补零， yyyy-mm-dd效果如下：2000-01-03

#include<stdio.h>
#include<iostream>
using namespace std;

int main()
{
int  year,month,day,sum;
int Month[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
while (cin >> year >>day)
{
sum = day;
Month[2] = 28;
if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
Month[2] = 29;
for (month = 1; sum > Month[month]; month++)
sum -= Month[month];

printf("%04d-%02d-%02d\n", year,month,sum);
}
return 0;
}