C++实现的一个打印日历程序

C++打印日历

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;
//打印日历头部 
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：