[c++]public,private运用范围简述

#include

class Object{
    public:
        int score;
        float height ;
        void Test(){
            printf("test function,age=%d\n",age);
            printf("test function,num=%d",num);
        }         
    
    private:  
        int age=10;   
        void Testprivate(){
            printf("testprivate function\n");
        }

    protected:
        int num=91;
        void Testprotected(){
            printf("testprotected function\n");
        }
 };
int main(){
    Object student1;
    student1.score=90;
    student1.height=170.1;
    student1.Test();

    //TestPrivate();        不能在此处使用
    //Testprotected();      不能在此处使用 


    return 0;
}

private定义的变量和函数只能在类内部使用；

public定义的变量和函数可以从任何地方访问

#include
using namespace std;
class Object{
    public:
        int score;
        float height ;
        void Test_public( );
    
    private:  
        int age=10;   
    void Test_private(int score);

    protected:
        int num=91; 
        void Test_protected();        
};

 /*函数定义到class外面*/
    void Object:: Test_public(){
        printf("test function,age=%d\n",age);
        printf("test function,num=%d",num);
    }    

    void Object:: Test_private(int score){
        cout<<"score="<