class Fish:public Animal
{
public:
Fish()
{
cout<<"this is Fish"<<endl;
}
~Fish()
{
cout<<"this is free Fish"<<endl;
}
};

C++繼承中父類的建構函式先於子類的建構函式呼叫；

子類的解構函式的呼叫順序先於父類的解構函式呼叫；

class Animal
{
public:
Animal()
{
cout<<"this is animal"<<endl;
}
~Animal()
{
cout<<"this is free animal"<<endl;
}
};
 

void main()

{

Fish fish;

}

如果父類中的建構函式含有兩個引數，則子類中宣告建構函式需要注意

如：

Animal中的建構函式是

Animal(int i,int j)

{}

則子類的建構函式：

Fish():Animal(100,200)

{}

上面兩段程式碼先後順序顛倒了............................................................................................

                                                                                                                                                                                                                                 ————郭仔