POJ C++程序设计 编程题＃1 编程作业—多态与虚函数

编程题 #1

#include <iostream>
using namespace std;
class A {
private:
int nVal;
public:
void Fun()
{ cout << "A::Fun" << endl; }
void Do()
{ cout << "A::Do" << endl; }
};
class B:public A {
public:
virtual void Do()
{ cout << "B::Do" << endl; }
};
class C:public B {
public:
void Do( )
{ cout << "C::Do" <<endl; }
void Fun()
{ cout << "C::Fun" << endl; }
};
void Call(
// 在此处补充你的代码
) {
p.Fun(); p.Do();
}
int main() {
C c; Call(c);
return 0;
}

输入

输出

样例输入

无

样例输出

A::Fun
C::Do

#include <iostream>
using namespace std;
class A {
private:
int nVal;
public:
void Fun()
{ cout << "A::Fun" << endl; }
void Do()
{ cout << "A::Do" << endl; }
};
class B:public A {
public:
virtual void Do()
{ cout << "B::Do" << endl; }
};
class C:public B {
public:
void Do( )
{ cout << "C::Do" <<endl; }
void Fun()
{ cout << "C::Fun" << endl; }
};
void Call(
B &p
// 在此处补充你的代码
) {
p.Fun(); p.Do();
}
int main() {
C c; Call(c);
return 0;
}