填空题

有以下程序:
#include <iostream>
using namespace std;
class Base

private:
int a,b;
public:
Base(int x, int y)

a=x;
b=y;

void Show()

cout<<a<< ’,’ <<b<<end1;

;
class Derived : public Base

private:
int c;
public:
Derived(int x, int y, int z) : Base(x,y),c(z)
void Show()

cout<<c<<end1;

;
int main()

Base b(50,50),*pb;
Derived d(10,20,30);
pb=&d;
pb->Show();
return 0;

运行后的打印结果为 【14】

【参考答案】

A0,B0