07d1.cpp

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/*
NIIT 《C++ & CGI PROGRAMMING &SCRRIPTING》 Skill Base
教材P7.6	7.D.1
审核：周永 [e-mail]	23:53 2004-10-18
测试环境：Microsoft Windowsn 2000(VC++)；Red Hat Linux 7.3；Red Hat Linux 9.0
*/

#include <iostream>
using namespace std;

class Number
{
private:
	int number;
public:
	Number (int = 0);
	Number operator + (int);
	Number operator + (const Number &);
	void display();
};

Number::Number (int num)
{
	number=num;
}
Number Number::operator + (int i)
{
	Number temp;
	temp.number=number+i;
	return temp;
}
Number Number::operator + (const Number &obj)
{
	Number temp;
	temp.number=number+obj.number;
	return temp;
}
void Number::display()
{
	cout << number << endl;
}

int main()
{
	Number num1(100);
	Number num2(200);
	Number num3=num1;
	Number tot;
	
	tot=num1+50;
	tot.display();

	tot=num1+num2;
	tot.display();

	num3.display();

  return 0;
}