使用 C++ 编写万年历程序

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#C #万年历

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本文介绍了一个简单的万年历程序，该程序能够显示输入年份中各个月份的具体日期排列情况。通过计算从公元元年到指定年份的总天数来确定每月第一天是周几，并据此展示日历。

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输入要查看的年份（要求为公元元年以后），就可以输出这一年每个月份的天数。

例如输入：2018

本程序为实现万年历的功能，请输入要查找的年份：
2018
一月
星期一星期二星期三星期四星期五星期六星期日
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31
二月
星期一星期二星期三星期四星期五星期六星期日
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28
三月
星期一星期二星期三星期四星期五星期六星期日
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31
四月
星期一星期二星期三星期四星期五星期六星期日
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30
五月
星期一星期二星期三星期四星期五星期六星期日
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31
六月
星期一星期二星期三星期四星期五星期六星期日
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30
七月
星期一星期二星期三星期四星期五星期六星期日
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31
八月
星期一星期二星期三星期四星期五星期六星期日
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
九月
星期一星期二星期三星期四星期五星期六星期日
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
十月
星期一星期二星期三星期四星期五星期六星期日
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31
十一月
星期一星期二星期三星期四星期五星期六星期日
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30
十二月
星期一星期二星期三星期四星期五星期六星期日
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31
Process returned 0 (0x0) execution time : 4.786 s
Press any key to continue.

代码如下：

#include <iostream>
#include <string>
#include <vector>
using namespace std;
int Week(int day)
{
    //这一年 1 月 1 日是星期几
    int week = (day % 7) +1;
    cout << "Monday\tTuesday\tWednesdayThursdayFriday\tSaturdaySunday" << endl;
    for(int i = 0; i < week -1; i++){
        cout << "\t";
    }//打印第一天前面的空格
}
int main()
{
    cout << "please input the year" << endl;
    int ye;
    cin >> ye;   //要查看的年份
    int year = ye - 1;
    //从公元元年 1 月 1 日到这一年 1 月 1 日一共的天数
    int day = ((year / 4) - (year / 100) + (year / 400)) * 366 + (year - ((year / 4) - (year / 100) + (year / 400))) * 365;
    int month1[31] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31};
    int month2b[28] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28};
    int month2a[29] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29};
    int month4[30] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30};
    int Jan = sizeof(month1) / sizeof(0);
    int Feb;
    int Apr = sizeof(month4) / sizeof(0);
    //一月
    cout << "January" << endl;
    Week(day);
    for(int i = 0; i < sizeof(month1) / sizeof(0); i++){
        cout << month1[i];
        if(((day + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //二月
    int day1 = day + Jan;   //二月之前的天数
    if((day1 % 7) != 0)
        cout << "\n";
    cout << "February" << endl;
    Week(day1);
    if((ye % 4 == 0 && ye % 100 != 0) || ye % 400 == 0){
        for(int i = 0; i < sizeof(month2a) / sizeof(0); i++){
            cout << month2a[i];
            if(((day1 + month2a[i]) % 7) == 0)
                cout << "\n";
            else
                cout << "\t";
        }
        Feb = sizeof(month2a) / sizeof(0);
    }
    else
    {
        for(int i = 0; i < sizeof(month2b) / sizeof(0); i++){
            cout << month2b[i];
            if(((day + Jan + month2b[i]) % 7) == 0)
                cout << "\n";
            else
                cout << "\t";
        }
        Feb = sizeof(month2b) / sizeof(0);
    }
    //三月
    int day2 = day + Jan + Feb;
    if((day2 % 7) != 0)
        cout << "\n";
    cout << "March" << endl;
    Week(day2);
    for(int i = 0; i < sizeof(month1) / sizeof(0); i++){
        cout << month1[i];
        if(((day2 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //四月
    int day3 = day + Jan * 2 + Feb;
    if((day3 % 7) != 0)
        cout << "\n";
    cout << "April" << endl;
    Week(day3);
    for(int i = 0; i < sizeof(month4) / sizeof(0); i++){
        cout << month1[i];
        if(((day3 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //五月
    int day4 = day + Jan * 2 + Feb + Apr;
    if((day4 % 7) != 0)
        cout << "\n";
    cout << "May" << endl;
    Week(day4);
    for(int i = 0; i < sizeof(month1) / sizeof(0); i++){
        cout << month1[i];
        if(((day4 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //六月
    int day5 = day + Jan * 3 + Feb + Apr;
    if((day5 % 7) != 0)
        cout << "\n";
    cout << "June" << endl;
    Week(day5);
    for(int i = 0; i < sizeof(month4) / sizeof(0); i++){
        cout << month1[i];
        if(((day5 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //七月
    int day6 = day + Jan * 3 + Feb + Apr * 2;
    if((day6 % 7) != 0)
        cout << "\n";
    cout << "July" << endl;
    Week(day6);
    for(int i = 0; i < sizeof(month1) / sizeof(0); i++){
        cout << month1[i];
        if(((day6 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //八月
    int day7 = day + Jan * 4 + Feb + Apr * 2;
    if((day7 % 7) != 0)
        cout << "\n";
    cout << "August" << endl;
    Week(day7);
    for(int i = 0; i < sizeof(month1) / sizeof(0); i++){
        cout << month1[i];
        if(((day7 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //九月
    int day8 = day + Jan * 5 + Feb + Apr * 2;
    if((day8 % 7) != 0)
        cout << "\n";
    cout << "September" << endl;
    Week(day8);
    for(int i = 0; i < sizeof(month4) / sizeof(0); i++){
        cout << month1[i];
        if(((day8 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //十月
    int day9 = day + Jan * 5 + Feb + Apr * 3;
    if((day9 % 7) != 0)
        cout << "\n";
    cout << "October" << endl;
    Week(day9);
    for(int i = 0; i < sizeof(month1) / sizeof(0); i++){
        cout << month1[i];
        if(((day9 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //十一月
    int day10 = day + Jan * 6 + Feb + Apr * 3;
    if((day10 % 7) != 0)
        cout << "\n";
    cout << "November" << endl;
    Week(day10);
    for(int i = 0; i < sizeof(month4) / sizeof(0); i++){
        cout << month1[i];
        if(((day10 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
    //十二月
    int day11 = day + Jan * 6 + Feb + Apr * 4;
    if((day11 % 7) != 0)
        cout << "\n";
    cout << "December" << endl;
    Week(day11);
    for(int i = 0; i < sizeof(month1) / sizeof(0); i++){
        cout << month1[i];
        if(((day11 + month1[i]) % 7) == 0)
            cout << "\n";
        else
            cout << "\t";
    }
}