如下程序执行后的输出结果是 【14】 。 #include <iostream> using namespace std; class Base { public: Base(int x,int y) { a=x; b=y; } void Show() { cout<<"Base: "<<a<< ’,’ <<b<<" "; } private: int a,b; }; class Derived : public Base { public: Derived(int x, int y, int z) : Base(x,y),c(z) { } void Show() { cout<<"Derived:"<<c<<end1; } private: int c; }; int main() { Base b(100,100),*pb; Derived d(10,20,30); pb=&b; pb->Show(); pb=&d; pb->Show(); return 0; }