c13_05.cpp

it can help you use C++ program we

#include <iostream.h>
class X
{
private:
	int		m_ivar;
public: 
	X(int n=10)			//带有缺省参数的缺省构造函数
	{
		m_ivar = n;		//给类的数据成员赋值
	}
	void print( )		//输出成员变量的信息
	{
		cout<<"m_ivar = "<<m_ivar<<endl;
	}
};

int main ( )
{
	X	x;				// 定义类X的对象时，没有制定初始化参数。
	x.print();
	X	y(38);
	y.print();

	return 0;
}