填空题

有以下程序: #include <iostream> using namespace std; class Base { int a; public: Base(int x) { a-x; } void show() { cout<<a; } }; class Derived : public Base { int b; public: Derived(int i) :Base(i+1) void show() { cout<<b; } }; int main ( ) { Base b(5) ,*pb; Derived d(1); pb=&d; pb->show (); return 0; } 运行后的打印结果是 【14】

【参考答案】

B