C++ 实现的一个打印日历程序

C++ 实现的一个打印日历程序

说明：总共有三个文件

1、month.h 为定义函数的头文件

2、month.cpp 为函数的实现代码

3、mainprog.cpp 为主函数的实现代码

month.h

void printMonth(int year,int month);
void printMonthTitle(int year,int month);
void printMonthBody(int year,int month);
int getStartDay(int year,int month);
int getTotalNumberOfDays(int year,int month);
int getNumberOfDaysInMonth(int year,int month);
bool isLeapYear(int year);

month.cpp

#include<iostream>
#include<iomanip>
#include "month.h"
using namespace std;
void printMonthTitle(int year,int month)
{
    char chMonth[12][7] = {"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};
    cout<<endl;
    cout<<setw(12)<<year<<"年"<<"    ";
    cout<<chMonth[month-1]<<endl;
    cout<<"------------------------------"<<endl;
    cout<<"  Sun Mon Tue Wed Thu Fri Sat"<<endl;
}

void printMonthBody(int year,int month)
{
    int startDay = getStartDay(year,month);
    int numberOfDaysInMonth = getNumberOfDaysInMonth(year,month);
    int i = 0;
    for(i=0; i<startDay; i++)
    {
        cout<<"    ";
    }
    for(i=1; i<=numberOfDaysInMonth; i++)
    {
        cout<<setw(4)<<i;
        if((i+startDay)%7==0)
        {
            cout<<endl;
        }
    }
    cout<<endl;
    cout<<"------------------------------"<<endl;
}

int getStartDay(int year,int month)
{
    int startDay1800 = 3;
    int totalNumberOfDays = getTotalNumberOfDays(year,month);
    return (totalNumberOfDays+startDay1800)%7;
}

int getTotalNumberOfDays(int year,int month)
{
    int total = 0;
    for(int i=1800; i<year; i++)
    {
        if(isLeapYear(i))
        {
            total=total+366;
        }
        else
        {
            total=total+365;
        }
    }
    for(int i=1; i<month; i++)
    {
        total=total+getNumberOfDaysInMonth(year,i);
    }
    return total;
}

int getNumberOfDaysInMonth(int year,int month)
{
    if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
    {
        return 31;
    }
    if(month==4||month==6||month==9||month==11)
    {
        return 30;
    }
    if(month==2)
    {
        return isLeapYear(year)?29:28;
    }
    return 0;
}

bool isLeapYear(int year)
{
    return year%400==0||(year%4==0&&year%100!=0);
}

mainprog.cpp

#include<iostream>
#include<iomanip>
#include "month.cpp"
#include "month.h"
using namespace std;
void main()
{
    cout<<"请输入年份（如2018）:";
    int year;
    cin>>year;
    cout<<"请输入月份（1-12）:";
    int month;
    cin>>month;
    printMonth(year,month);
}

void printMonth(int year,int month)
{
    printMonthTitle(year,month);
    printMonthBody(year,month);
}

结果显示