usedate.cpp

大于小于等于 操作符重载 对于日期的使用

#include <iostream>
#include "myDate.h"
using namespace std;

int main()
{
	//自定义四个不同日期（日期 A 为默认构造日期）
    Date A;
    Date B(1980, 1, 1);
    Date C(2007, 5, 20);
	Date D(1980, 1, 1);
	//打印四个日期，以作比较
	cout << "Show all the years will be compared:" << endl;
    cout << "The default constructor --> "<<"A = ";
    A.Show();
    cout << "B = ";
    B.Show();
    cout << "C = ";
    C.Show();
	cout << "D = ";
	D.Show();
	
	//使用重载后的‘ 〉’比较日期 B 和 C，显示其中较大的年份 
	cout<< "Compare the year of B and C with '>'" << endl;
	if( B>C == true)
	{
		cout<< "The bigger year is: ";
		B.Show();
	}
	else
	{
		cout<< "The bigger year is: ";
		C.Show();
	}

	//使用重载后的‘〈 ’ 比较日期 B 和 C，显示其中较小的年份
	cout<< "Compare the year of B and C with '<'" << endl;
	if( B<C == true)
	{
		cout<< "The smaller year is: ";
		B.Show();
	}
	else
	{
		cout<< "The smaller year is: ";
		C.Show();
	}

	//使用重载后的‘ = ’比较日期 B 和 D，判断他们是否相等
	cout<< "Compare the year of B and D with '='" << endl;
	if( (B = D) == true)
	{
		cout<< "They are the same year, they are equal." << endl;
	}
	else
	{
		cout<< "They are not the same year, they are not equal." << endl;
	}
	

	return 0;

  }