更多"若有以下程序 #include <iostream> us"的相关试题:
[单项选择]若有以下程序
#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<<",";
;
class C: public B,public A
private:
int c;
public:
C(int k):A(k-2),B(k+2)
c=k;
void disp( )
A::disp( );
B::disp( );
cout<<c<<end1;
;
int main( )
C obj(10);
obj.disp( );
return 0;
程序执行后的输出结果是
A. 10,10,10
B. 10,12,14
C. 8,10,12
D. 8,12,10
[单项选择]若有以下程序 #include <iostream> using namespace std; class A { public: A(int i,int j) { a=i; b=j; } void move(int x, int y) { a+=x; b+=y; } void show( ) { cout < <a < <" , " <<b<< end1; } private: int a,b; }; class B : private A { public: B(int i,int j) :A(i,j) {} void fun ( ) { move (3, 5); } void f1 ( ) { A::show( ); } }; int main ( ) { B d(3,4); d. fun ( ); d.f1( ); return 0; } 程序执行后的输出结果是 ( )。
A. 3,4
B. 6,8
C. 6,9
D. 4,3
[填空题]若有以下程序:
#include <iostream>
using namespace std;
class Base
{
public:
void who( )
{
cout<<"class Base"<<end1;
}
};
class Derivedl : public Base
{
public:
void who( )
{
cout<<"class Derivedl"<<end1;
}
};
class Derived2 : public Base
{
public:
void who( )
{
cout<<"class Derived2"<<end1;
}
};
int main( )
{
Base *p;
Derivedl obj1;
Derived2 obi2;
p=&obj 1;
p=&obj2;
p->who ( );
return 0;
}
则该程序运行后的输出结果是 【14】 。