( 32 )有如下程序:#includeiostreamUsing namespace std;class A{public:virtual void f () {cout+1;}void g () {cout2;}};class B:public A{public:virtual void f () {cout3;}void g () {ecut4;}};void show ( A a ) {a.f ( ) ; a.g ( ) ; }int main () {B b;show ( b ) ;return 0;}运行时的输出结果是A ) 12B ) 34C ) 14D ) 32
( 32 )有如下程序:
#include<iostream>
Using namespace std;
class A{
public:
virtual void f () {cout+1;}
void g () {cout<<2;}
};
class B:public A{
public:
virtual void f () {cout<<3;}
void g () {ecut<<4;}
};
void show ( A &a ) {a.f ( ) ; a.g ( ) ; }
int main () {
B b;
show ( b ) ;
return 0;
}
运行时的输出结果是
A ) 12
B ) 34
C ) 14
D ) 32
相关考题:
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