一個簡單的c++類的定義和實例化

#include "iostream"
#include <string>
using namespace std;

class mycoach
{
private:
    string name;
    short age = 0;
public:
    void coachgreeting(string  _name, int _age)
    {
        name = _name;
        age = _age;
        cout << "大家好，我是" << name << "今年芳齡" << age << endl;
    }
protected:
};
void main()
{
    char r[10] = {0};
    cout << "好好學編程，包養陳培昌" << endl;
    cout << "請翻帥哥的牌子：";
    cout << "厲智 陳培昌 程勁";
    cin>>r;
    cout << "這位爺翻了" << r << "的牌子" << endl;
    mycoach ritz;
    ritz.coachgreeting("厲智", 31);
    system("pause");
}

類是一種高級結構體
類是內存固定數據塊的別名，類是一個抽象概念，不會為你分配內存，
用數據類型定義變量的時候才會為你分配內存