int main(){
Carp myLunch;
Tuna myDinner;
cout << "Getting my food to swim" << endl;
cout << "Lunch: ";
myLunch.Swim();
cout << "Dinner: ";
myDinner.Swim();
// 取消此注释可以看到被保护的成员变量不可从类之外访问
//myLunch.FreshWaterFish = false;
return 0;
}
int main()
{
Carp myLunch;
Tuna myDinner;
cout << "Getting my food to swim" << endl;
cout << "Lunch: ";
myLunch.Swim();
cout << "Dinner: ";
myDinner.Swim();
// uncomment line below to see that protected members
// are not accessible from outside the class hierarchy
// myLunch.FreshWaterFish = false;
return 0;
}