include<iostream>
#include<string>
using namespace std;
class parent{
protected:
int mv;
public:
parent(){
mv = ;
}
int value(){
return mv;
}
};
class child:public parent{
public:
int addvalue(int v){
mv = mv + v;
}
int changemv(int v){
mv = v;
}
};
int main(){
parent p;
child c;
cout << "c.value()=" << c.value() << endl;//
cout << "p.value()=" << p.value() << endl;//
c.addvalue();
cout << "c.value()=" << c.value() << endl;//
cout << "p.value()=" << p.value() << endl;//
cout << "c.changemv()后" << endl;
c.changemv();
cout << "c.mv=" << c.value() << endl;//
cout << "p.mv=" << p.value() << endl;//
return ;
}
运行结果：
c.value()=100
p.value()=100
c.value()=350
p.value()=100
c.changemv()后
c.mv=380
p.mv=100
结论：
对于具有继承关系的类，父类和子类各自有各自的成员变量，子类对其成员变量的修改并不会影响父类的