demo_6_const_object_2.cpp

对于一个初涉VC＋＋的人来书

//************************************************

# include <iostream.h>

class Student
{
public:
	Student(int n,float s):num(n),score(s){}
	void change(int n,float s) {num=n;score=s;}
	void display() {cout<<num<<" , "<<score<<endl;} //const可区分函数重载
    void display() const {cout<<num<<" : "<<score<<endl;}
private:
	int num;
    float score;
};

int main()
{
	const Student stud(101,78.5);

//	stud.change(101,80.5); //常对象数据成员的值不能被改变
	stud.display(); //只能用常成员函数访问常对象的数据成员,
  	                //但仍然不允许修改常对象数据成员的值.

	return 0;
}