有以下程序: #include<iostream> using namespace std; Class A{ public: A(){tout{("A"} }; classB{public:B(){cout<<"B";>> classC:public A{ B b; public: C(){cout<<"C";} }; int main(){C obj;return 0;} 执行后的输出结果是( )。
A.CBA
B.BAC
C.ACB
D.ABC
第1题:
以下程序的执行结果为______。
include<iostream.h>
class A
{public:A(){cout<<“a”;}
~A(){cout<<“b”;}};
class B:public A
{public:
B(){cout<<“c”;)
~B(){cout<<“d”;}};
void main()
{B b;}
第2题:
下面程序输出的结果为 #include"iostream.h” class A { public: A(){cout<<"CLASSA"<<endl;} ~A() {} }; class B:public A { public: B(){cout<<"CLASS B"<<endl;} ~B(){} }; void main() { A*p; p=new B;
A.CLASS A CLASS B CLASS B CLASS B
B.CLASS A CLASS B CLASS A CLASS B
C.CLASS A CLASS B CLASS B
D.CLASS A CLASS B
第3题:
有以下程序:
include <iostream>
using namespace std;
class A
{
public:
virtual void show()
{
cout<<"A";
}
};
class B : public A
{
public:
void show()
{
cout << "B";
}
};
void display( A * obj )
{
obj-> show();
}
int main ( )
{
A demol;
B demo2;
display( & demol );
display( & demo2 );
return 0;
}
执行后的输出结果为【 】。
第4题:
请将如下程序补充完整,使得输出结果为:bbaa。
include<iostream>
using naluespace std;
class A{
public:
______{eout<<"aa";}
};
class B:public A{
public:
~B( ){eont<<"bb";}
};
int ulain( ){
B*P=new B;
delete P;
return 0;
}
第5题:
有下列程序:
include<iostream>
using namespace std;
class ONE
{
public:
virtual void f(){COUt<<"1";}
};
c1assTWO:public ONE
{
public:
TWO(){cout<<"2";}
};
class THREE:public TWO
{
pub
第6题:
有以下程序:
include<iostream.h>
class A
{
int x;
public:
A(int a)
{
x=a;
}
friend class B;
}
class B{
public:
void print(A a){
a. x--;
cout<<a.x<<end1;
}
};
void main()
{
A a(10);
B b;
b.print(a) ;
}
程序执行后的输出结果是【 】。
第7题:
在下面程序中,括号里应填( )。 #include <iostream> using namespace std; class A { public: void fun( ) { cout << "Hello" << endl; } }; class B:: public A { void fun( ) { ( ) //调用基类的函数fun( ) tout << "HI" << endl; } };
A.fun()
B.A. fun()
C.A::fun()
D.A->fun(
第8题:
下面程序输出的结果是【 】。
include <iostream>
using namespacc std;
class A {
public:
void show(){tout<<"A!";}
};
class B: public A{
public:
virtual void show(){cout<<"B!";}
};
class C: public B{
public:
virtual void show(){cout<<"C!";}
};
void show_info(A *i){i->show();}
void main(){
A ia;B ib;C ic;show_info(&ia); show_info(&ib);show_info(&ic);
}
第9题:
有以下程序: #include<iostream> using namespace std; class A {private: int a; public: A(int i) {a=i;} void disp() {cout<<a<<“,”;}}; class B {private: int b; public: B(int j) {b=j;} void disp() {cout<<b<<“,”;
A.10,10,10
B.10,12,14
C.8,10,12
D.8,12,10