更多"有如下程序
#include
using namespa"的相关试题:
[填空题]若有以下程序:
#include <iostream>
using namespace std;
class Basepublic:
Base( )
x=0;
int x;
;
class Derived1: virtual public Basepublic:
Derived1( )
x=10;
;
class Derived2: virtual public Basepublic:
Derived2( )
x=20;
;
class Derived: public Derived1, protected Derived2
;
int main( ) Derived obj;
cout<<obj.x<<end1;
return 0;该程序运行后的输出结果是 【15】 。
[单项选择]有如下程序
#include
using namespace std;
class A{
public:
virtual void func1( ){cout<<"A1";}
void func2( ){cout<<"A2";}
} ;
class B:public A{
public:
void func1( ){cout<<"B1";}
void func2( ){cout<<"B2";}
} ;
int main( ){
A*P=new B;
p->func1( );
P->func2( );
return 0;
}
运行此程序,屏幕上将显示输出【 】
A. B1 B2
B. A1 A2
C. B1 A2
D. A1 B2