[c++]万年历

</pre><pre name="code" class="cpp">#include<iostream>
#include<iomanip>

using namespace std;

void main()
{
int monthDay[12] = { 31,0,31,30,31,30,31,31,30,31,30,31 }; //确定每个月的天数

cout << "please enter the year" << endl;
int year;
cin >> year;

if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
monthDay[1] = 29;
else
monthDay[1] = 28;                                 //判断是否为闰年

int startDay;
startDay = ((year - 1) + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400 + 1) % 7; //判断这一年第一天是星期几
//cout << startDay << endl;

int count = 1;
int day = 1;
int temp;
for (int i = 0; i < 12; i++)
{
cout << "Mon   Tue   Wed   Thu   Fri   Sat   Sun" << endl; //打印每个月的星期
while (count<startDay)
{
cout << setw(6) << "     ";                        //每个月开始空的几天放空格
count++;
}
while (day <= monthDay[i])                                  //判断日期是否超过当月天数
{
while (count <= 7)				     //判断是否超出一周7天
{
if (day <= monthDay[i])
{
cout << setw(3) << day << "   ";     //对齐
day++;
count++;
temp = count;
}
else                                          // 完成这一周的打印强制退出
{
temp = count;
count = 8;
}
}
cout << endl;                                          //一周换行
count = 1;
}
cout << endl;                                                   //一月换行
day = 1;                                                       //一个月结束重置日期
startDay = temp;
}
}