C++ 第一课 类的定义

#include <iostream>using namespace std;class animal{    public:        int  getAge()        {            return mAge;        }        void setAge(int age)        {            mAge = age;        }        void addAge()        {            mAge++ ;        }    private:        int mAge;};int main(){    animal A;    A.setAge(10);    cout<<"the age is "<<A.getAge();    return 0;}