使用一个CDate转换操作符转换成一个整数

[c++]代码库

// 使用一个CDate转换操作符转换成一个整数
#include <iostream>

class CDate {
private:
	int m_nDay; // Range: 1 - 30 (lets assume all months have 30 days!)

	int m_nMonth; // Range: 1 - 12
	int m_nYear;

public:

	// Constructor that initializes the object to a day, month and year
	CDate(int nDay, int nMonth, int nYear) :
			m_nDay(nDay), m_nMonth(nMonth), m_nYear(nYear) {
	}
	;

	// Convert date object into an integer.
	operator int() {
		return ((m_nYear * 10000) + (m_nMonth * 100) + m_nDay);
	}

	void DisplayDate() {
		std::cout << m_nDay << " / " << m_nMonth << " / " << m_nYear;
	}
};

int main() {
	// Instantiate and initialize a date object to 25 May 2008
	CDate mDate(25, 6, 2008);

	std::cout << "The date object is initialized to: ";

	// Display initial date
	mDate.DisplayDate();
	std::cout << std::endl;

	// Get the integer equivalent of the date
	int nDate = mDate;

	std::cout << "The integer equivalent of the date is: " << nDate;

	return 0;
}