c++实现日历

客官°小女子只卖身不卖艺 2023-09-26 19:56 102阅读 0赞

**实现思路：**

1.  获取输入月份最大天数，考虑是否是闰年。
2.  获取输入月份1号是周几，确定从第一行开始位置

#include <iostream>
    #include <iomanip>
    using namespace std;
    //获取每月1号是周几
    int Date(int y, int m, int d)
    {
        int week;
        if (m == 1 || m == 2) {
            y = y - 1;
            m = m + 12;
        }
        week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400 + 1) % 7;
        return week;//其中0-6表示周日到周六
    }
    //是否是闰年，获取月的最大天数
    int DayNumofMonth(int y, int m)
    {
        int monthmax;
        if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12) monthmax = 31;
        if (m == 4 || m == 6 || m == 9 || m == 11) monthmax = 30;
        if (m == 2)
        {
            if (y % 4 == 0 && y % 100 != 0 || y % 400 == 0)//闰年 
                monthmax = 29;
            else//非闰年
                monthmax = 28;
        }
        return monthmax;
    }
     
    void  DispCalendar(int y, int m)
    {
        //标题模块
        cout << "    公元" << y << "年     第" << m << "月日历" << endl;
        int a = 1;
        for (a=0;a<7;a++)
            cout << setw(5)<<a;
        cout << endl << "=====================================" << endl;
     
        //日期模块
        int Date(int y, int m, int d);
        int b = 0,week;
        week = Date(y, m, 1);
        for (b = 0;b < week;b++)
            cout <<setw(5)<<" ";//每月一号对应的周几前面要有缩进
        int DayNumofMonth(int y, int m);
        int c = 1,monthmax;
        monthmax = DayNumofMonth(y, m);
        while (c <= monthmax)
        {
            cout << setw(5) << c ;
            c++;
            week++;
            if (week % 7 == 0)
                cout << endl;
        }
        cout << endl << "=====================================" << endl;
    }
    int main()
    {
        int y, m;
        cout << "请输入年份:";
        cin >> y;
        cout << "请输入月份:";
        cin >> m;
        cout << endl;
        
        DispCalendar(y, m);
        return 0;
    }