/*q1.cpp*/

 //一个简单的类极其实例化

 #include<iostream>

 using namespace std;

 class Point{

     public:

         //设置坐标

         void setPoint(int x,int y){

             xPos = x;

             yPos = y;

         }

         //打印坐标

         void printPoint(){

             cout<<"x = "<<xPos<<endl;

             cout<<"y = "<<yPos<<endl;

         }

         //在类外定义函数

         void foo();

     private:

         int xPos;

         int yPos;

 };

 //类外定义的函数

 void Point::foo(){

     cout<<"foo是类外定义的函数"<<endl;

 }

 int main(){

     Point point;

     point.setPoint(,);

     point.printPoint();

     point.foo();

     return ;

 }

 /*q2.cpp*/

 //检测一下public,private,protect的使用权限

 #include<iostream>

 using namespace std;

 class Animal{

     public:

         string a = "a dog";

         void show1(){

             cout<<a<<endl;

         }

     protected:

         string b = "a snake";

         void show2(){

             cout<<b<<endl;

         }

     private:

         string c = "a turtle";

         void show3(){

             cout<<c<<endl;

         }

 };

 //只有在类中的public中定义的属性和方法才能从类的外部访问

 int main(){

     Animal dog;

     cout<<dog.a<<endl;

     dog.show1();

     return ;

 }