C++_构造函数

Posted 2021-10-28 CaoPengCheng&

C++_构造函数

#include<iostream>
using namespace std;
/**
 * @author CaoPengCheng
 * @date 2021-10-09
 */

class Date{
public:
	Date(int,int,int);
	Date(int,int);
	Date(int);
	Date();
	void disPlay();
private:
	int month;
	int day;
	int year;
};

Date::Date(int m,int d,int y):month(m),day(d),year(y){}

Date::Date(int m,int d):month(m),day(d){
	year=2021;
}

Date::Date(int m):month(m){
	year=2021;
	day=1;
}

Date::Date(){
	year=2021;
	day=1;
	month=1;
}

void Date::disPlay(){
	cout<<month<<"/"<<day<<"/"<<year<<endl;
}

int main(){
	Date d1(10,13,2005);
	Date d2(10,13);
	Date d3(10);
	Date d4;
	d1.disPlay();
	d2.disPlay();
	d3.disPlay();
	d4.disPlay();
	return 0;
}