day（0~6）代表每月第一天起始位置，stop代表每月天数，每天之间空两个空格。输入不同的day和stop，输出每月日历的样子。假设day为2，stop为31，则输出样式为

#include<iostream>
#include<iomanip>

using namespace std;

int main()
{
    int day, stop;
    int date = 1;
    cout << "输入每月第一天位置:";
    cin >> day;
    cout << "输入每月天数：";
    cin >> stop;
    cout << "  Sun  Mon  Tue  Wed  Thu  Fri  Sat\n";
    if (day != 0)
        cout << setw(day * 5) << " ";
    while (date <= stop)
    {
        cout << setw(5) << date;
        date++;
        if ((date + day) % 7 == 1)
            cout << "\n";
    }

    return 0;
}