代码

#include <iostream>
#include<iomanip>
#include<windows.h>
#include<string>
#include<vector>
#include<array>
using namespace std;


bool judge_runnian(int year) {/*judge_runnian：判断是否是闰年*/
    bool ifrun;
    if ((year % 4 == 0) & (year % 100 != 0)) {
        ifrun = true;
    }
    else if ((year % 4 == 0) & (year % 400 == 0)) {
        ifrun = true;
    }
    else {
        ifrun = false;
    }
    return ifrun;
}

vector<string> splitstring(const string s, const string c)//利用空格分隔字符串
{
    string::size_type pos1, pos2;//::标明类的变量
    vector<string> v;
    pos1 = 0;
    pos2 = s.find(c);
    while (string::npos != pos2) {
        v.push_back(s.substr(pos1, pos2 - pos1));
        pos1 = pos2 + c.size();
        pos2 = s.find(c, pos1);
    }
    if (pos1 != s.length())
        v.push_back(s.substr(pos1));
    return v;
}

int main()//主函数代码如下
{
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_INTENSITY | FOREGROUND_GREEN);//设置cmd窗口字体颜色
    cout << "请输入年月（以一个空格分开）" << endl;
    string day;
    getline(cin, day);
    vector<string> newday;
    newday = splitstring(day, " ");
    int year, month;
    year = atoi(newday[0].c_str());
    month = atoi(newday[1].c_str());
    cout << year << "年" << month << "月日历如下：\n";

    // 计算月初是星期几
    int year0 = 2000;  // 与2000年1月作对比
    int gap = year - year0;
    vector<int> array1;
    for (int i = year0; i < year; i++) {
        array1.push_back(i);
    }
    int run_num = 0;
    for (int i = 0; i < array1.size(); i++)
    {
        int j = judge_runnian(array1[i]);
        run_num += j;
    }
    int run = judge_runnian(year);
    int feb = 28 + run;
    int day_gap = 0;
    int year_gap = gap * 365 + run_num; // 计算年差天数
    int array2[] = { 31, feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int month_gap = 0;
    for (int i = 0; i + 1 < month; i++) {
        month_gap += array2[i];  // 计算月差天数
    }
    day_gap = year_gap + month_gap;
    int week = day_gap % 7;  // 天数差除以7，即可知道1号的位置
    int star = 5 + week;  // 2000年1月1号是星期六，前面带5颗星* * * * * 1 2
    if (star >= 7) {
        star -= 7;
    }
    
    
    // 打印月历
    for (int i = 0; i < star + array2[month-1]; i++) {
        if (i < star) {
            cout << "  *  ";// 1月前面的空缺用*来填补
        }
        else {
            cout << setw(3) << i + 1 - star;
            cout << "  ";
        }
        
        if ((i + 1) % 7 == 0)
            cout << endl;
    }


    
return 0;
};


};

演示