更多"下面程序中错误之处是 ______。 #include<iostre"的相关试题:
[单项选择]下面程序中错误之处是 ______。
#include<iostream.h>
class A{
private:
int xl;
protected:
int x2;
public:
int x3;
};
class B: public A{
private:
int b1;
protected:
int b2;
public:
int b3;
void disp( ){cout<<x1<<b2<<end1;} //A
void set(int i){x3=i;} //B
};
void main( )
B bb;
bb. a3=10 //C
bb. b3=10 //D
}
[单项选择]下面程序中错误之处是 ______。
#include<iostream.h>
class A
private:
int xl;
protected:
int x2;
public:
int x3;
;
class B: public A
private:
int b1;
protected:
int b2;
public:
int b3;
void disp( )cout<<x1<<b2<<end1; //A
void set(int i)x3=i; //B
;
void main( )
B bb;
bb. a3=10 //C
bb. b3=10 //D
[单项选择]请找出下列程序中错误之处 ______。
#include<iostream.h>
class A
private:
int x1;
protected:
int x2;
public:
int x3;
;
class B:public A
private:
int y1;
protected:
int y2;
public:
int y3;
void disp( )cout<<x1<<y1<<end1: //A
void set(int i) x2=i; //B
;
void main( )
B bb;
bb.x3=10; //C
bb.y3=10; //D
[单项选择]下面程序的结果是
#include
class A
{
int a;
public:
A( ):a (1){}
void showa( ){cout<<a;}
};
class B
{
int a;
public:
B( ):a (2){}
void showa( ){cout<<a;}
};
class C:public A, public B
{
int a;
public:
C( ):a (3){}
void showa( ){cout<<a;}
};
void main( )
{
C c;
c.showa( );
}
A. 1
B. 2
C. 3
D. 程序有错误
[单项选择]下面程序的结果是
#include<iostream.h>
class test private:
int num;
public:
test( );
int getint( ) return num;
~test( );;
test::test( )
num=0;
test::~test( )
cout<<"Destructor is active"<<endl;
void main( )
test x[3];
cout<<"Exiting main"<<endl;
A. Exiting main
B. Exiting main
C. Exiting main
D. Exiting main
[单项选择]下面程序的结果是 #include<iostream.h> class A { int a; public: A( ):a(1){} void showa( ){cout<<a;} }; class B { int a; public: B( ) :a(2) {} void showa( ){cout<<a;} }; class C://public A,public B { int a; public: C( ):a(3){} void showa( ){cout<<a;} }; void main( ) { C c; c.showa( ); }
A. 1
B. 2
C. 3
D. 程序有错误
[单项选择]下面程序的输出结果是
#include<iostream.h>
class example
int a;
public:
example(int b) a=b++;
void pnnt( ) a=a+1;cout < < a < <" ";
void print( ) constcout < < a < <" ";
;
void main( )
example x(3) ;
const example y(2) ;
x.print( ) ;
y.print( ) ;
A) 2 2 B) 4 3 C) 4 2 D) 3 2
[单项选择]分析下面程序,该程序的运行结果是( )。
#include<iostream.h>
class cmm
public:
static int m;
cmm( )
m++;
cmm(int n)
m=n;
static void testm( )
m++;
;
int cmm :: m=0;
void main( )
cmm A;
cmm B(3);
A. testm();
B. m=3
C. m=4
D. m=5
E. m=6
[单项选择]下面程序的结果是
#include<iostream.h>
class A
public:
A( )cout<<"construtA" <<endl;
virtual ~A( ) cout << "destructA" <<endl;;
class B:public A
;
class C://public A
;
class D://public B,public C
;
void main( )
Dd;
A. constructA
B. constructA
C. constmctA
D. constmctA
[单项选择]下面程序的运行结果为
#include<iostream.h>
Class A
static int n;
public:
A( ) n=1;
A. int :n=2;
[单项选择]下面程序的运行结果是
#include<iostream.h>
class base
protected:
int a;
public:
base( ) cout < < "0";
;
class base l: virtual base
public:
base l ( ) cout < <"1";
;
class base 2: virtual base
public:
base2 ( ) cout < <"2";
;
class derived: public base 1, public base2
public:
derived( ) cout < < "3";
;
void main( )
derive obj;
cout < < endl; A) 0123 B) 3120 C) 0312 D) 3012
[单项选择]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<<"CLASSB"<<endl;
~B( )
;
void main( )
A * p;
p=new B;
B *q;
q=new B;
A. CLASS A
B. CLASS A
C. CLASS A
D. CLASS A
[单项选择]下面程序的运行结果为
#include<iostream. h>
class A
public:
A( ) cout < <"1";
~A( ) cout < <"2";
;
class B:public A
public:
B( ) cout < <"3";
~B( ) cout < <"4";
;
void main( )
B b;
A) 1234 B) 1324 C) 1342 D) 3142