#include<iostream>
using namespace std;
class AA{
lilt k;
protected:
int n;
void setK ( int k ) { this->k=k;}
public:
void setN ( int n ) { this->n=n;}
};
class BB: public }{/* 类体略 */};
int main () {
B.B x_ ; //1
x .n=1; //2
x.setN ( 2 ) ; //3
x.k=3; //4
x .setK ( 4 ) ;
return 0;
}
在标注号码的四条语句中正确的是
A. ) 1
B. ) 2
C. ) 3
D. ) 4
[单选题]( 30 )有如下程序:#include<iostream>using namespace std;class Base{public:B.ase(int x=0){cout<<x;}};class Derived:public Base{public:D.erived(int x=0){cout<<x;}private:B.ase val;};int main(){D.erived d(1);return 0;}程序的输出结果是A. ) 0B. ) 1C.
[单选题]( 30 )有如下程序:#include<iostream>using namespace std;public:A.A(){ cout<<'1'; }};class BB: public AA{int k;public:B.B():k(0){ cout<<'2'; }B.B(int n):k(n){ cout<<'3';}}int main(){B.B b(4), c;return 0;}运行时的输出结果是A. ) 1312B. )
[单选题]( 32 )有如下程序;#include<iostream>using namespace std;class Base{public:void output(){cout<<1;}virtual void Print(){cout<<'B';}};class Derived:public Base{public:void output(){cout<<2;}void Print(){cout<<'D';}};int main(
[试题]( 10 )有如下程序:#include<iostream>using namespace std;class A{public:A.(){cout<<"A" ; }~A(){cout<<"A" ; }} ;class B {A. a;public:B.(){cout<<"B";}~B(){cout<<"B";}};int main (){B. b;return 0;}程序的输出结果是 ___________
[单选题]( 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
[单选题]( 35 )有如下程序:#include<iostream>using namespace std;class ONE{int c;public:ONE ( ) : c ( 0 ) {cout<<1;}ONE ( int n ) : c ( n ) {cout<<2;}};class TWO{ONE onel;ONE one2;public:TWO ( int m ) : one2 ( m ) {cout<<3;}};int main () tTW
[单选题]( 33 )有如下程序:#include<iostream>using namespace std;class Pair{int m;int n;public:Pair ( int i , int j ) : m ( i ) , n ( j ) {}boot operator > ( pair p ) const; // 须在类体外给出定义} ;int main () {Pair Al ( 3,4 ) , p2 ( 4,3 ) ; p3 ( 4,5 ) ;C.out<&l
[试题]( 11 )有如下程序:#include<iostream>using namespace std;class Monitor{public:Monitor ( char t ) : type ( t ) {}void print ( ) const{cout<<"The type of monitor is"<<type<<endl;}private:char type;};class Computer{public:C.omputer ( i
[单选题]( 29 )有如下程序:#include<iostream>using namespace std;class Name{char name[20];public:Name(){strcpy(name,""); cout<<'?';}Name(char *fname)){strcpy(name,fname); cout<'?';}};int main(){Name names[3]={Name(" 张三 "),Name(" 李四 ")};Retu
[单选题]( 31 )有如下程序:#include<iostream>using namespace std;class C1{public:~C1(){ cout<<1; }};C.lass C2: public c1{public:~c2(){ cout<<2; }};int main(){C.2 cb2;C.1 *cb1;return 0;}运行时的输出结果是A. ) 121B. ) 21C. ) 211D. ) 12