更多"应在下列程序画线处填入的正确语句是 ( )。 #include <"的相关试题:
[单项选择]应在下列程序画线处填入的正确语句是 ( )。 #include <iostream> using namespace std; clas Base { public: void fun( ) { cout<<"Base::fun"<<end1; } }; class Derived : public Base { void fun( ) { ________________//显示调用基类的函数 fun( ) cout<<"Derived::fun"<<end1; } };
A. fun();
B. Basfun();
C. Base::fun();
D. Base->fun();
[单项选择]在下列程序画线处填入的正确语句是( )。
#include <iostream>
using namespace std;
class Base
public:
void fun( )
cout<<"Base::fun",<<end1;
;
class Derived:public Base
void fun( )
______________ //显式调用基类的函数fun( )
cout<<"Derived::fun" <<end1;
;
A. fun();
B. Base.fun();
C. Base::fun();
D. Base->fun();
[单项选择]下面程序有注释的语句中,错误的语句是( )。
#include <iostream>
using namespace std;
class A
int a;
public:
void show A( )cout<<"this is A!";
;
class B:public A
int b;
public:
void show B( )cout<< "this is B!";
;
void main( )
A ia,*piA;
B ib,*piB;
piA=ia; //第一个测试语句
piA=&ib; //第二个测试语句
piA->showA( ); //第三个测试语句
piA->showB( ); //第四个测试语句
A. 第一个测试语句
B. 第二个测试语句
C. 第三个测试语句
D. 第四个测试语句
[填空题]下列程序的输出结果为2,请将程序补充完整。
#include <iostream>
using namespace std;
class Base
{
public:
【12】 void fun( ) {cout<<1;}
};
class Derived: public Base
{
public:
void fun( ) {cout<<2; }
};
int main( )
{
Base *p=new Derived;
p->fun( );
delete p;
return 0;
}
[单项选择]为使程序的输出结果为:
Base:: fun
那么应在下列程序画线处填入的正确语句是( )。
#include <iostream>
using namespace std;
class Base
public:
void fun ( )
cout<<"Base: :fun"<<end1;
;
class Derived : public Base
public:
void fun ( )
cout<<"Derived: :fun"<<end1;
;
int main ( )
Base a,*pb;
Derived b;
_________;
pb->fun( ); //调用基类的成员函数 fun( )
return 0 ;
A. pb=&a
B. pb=b
C. pb=&b
D. pb=&Base
[单项选择]下列程序中画线处应填入的语句是
classBase
public:
voidfun( )COUt<<"Baseoffun"<<endl;
;
classDerived:publicBase
voidfun( )
_______//显示基类的成员函数fun
cout<<"Derivedoffun"<<endl;
;
A. fun( );
B. Base.fun( );
C. Base::fun( );
D. Base->fun( );
[单项选择]为完成下面的程序,应在划线处填入的语句是 #include<iostream> using namespace std; class Base { private: int x; public: Base (int i) { x=i; } ~Base( ){} }; class Derived:public Base { public: ______________//完成类Derive构造函数的定义 }; int main( ) { Derived Obj; return 0; }
A. Derived(int :Base({}
B. Derived(){}
C. void Derived (int :Base({}
D. Derived(int {Base(;}
[填空题]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;
}
[单项选择]下列程序中画线处应填入的语句是 class Base { public: void fun( ){cout<<"Base of fun"<<end1;} }; class Derived:public Base { void fun( ) { ______//显示基类的成员函数fun cout<<"Derived of fun"<<end1; } };
A. fun( );
B. Basfun( );
C. Base: :fun( );
D. Base->fun( );