/* 程序7.8：帶參數(shù)默認值的構造符.cpp：*/
#include<iostream>		//包含頭文件
using namespace std;	//使用名字空間std
class Calculator		//聲明一個類Calculator
{
private:
	int iNumber1,iNumber2,iTotal;	//聲明私有成員變量
public:
	Calculator(int x=1,int y=2);	//聲明構造符函數(shù)
	void add();				//聲明加函數(shù)
	void display();			//聲明顯示函數(shù)
};
int main()					//main()函數(shù)開始
{
	Calculator cObj1;		//聲明不帶參數(shù)類對象,調(diào)用默認構造符
	cObj1.add();			//調(diào)用加函數(shù)
	cObj1.display();		//調(diào)用顯示函數(shù)

	Calculator cObj2(10,20);//聲明帶參數(shù)類對象,調(diào)用構造符函數(shù)
	cObj2.add();			//調(diào)用加函數(shù)
	cObj2.display();		//調(diào)用顯示函數(shù)
	return 0;
}							//main()函數(shù)結(jié)束
Calculator::Calculator(int x,int y)	//定義帶參數(shù)構造符
{
	iNumber1=x;
	iNumber2=y;
}
void Calculator::add()		//定義加函數(shù)
{
	iTotal=iNumber1+iNumber2;
}
void Calculator::display()	//定義顯示函數(shù)
{
	cout<<"\n數(shù) "<<iNumber1<<" 和數(shù) "<<iNumber2
		<<" 的和是 "<<iTotal<<endl;
}