更多"下列程序执行结果是 #include<iostream.h> cl"的相关试题:
[单项选择]下列程序执行结果是
#include <iostream.h>
class A
public:
int a;
A( ):a(10)cout<<a<<endl;
;
void main( )
A obj1;
A obj2(obj1);
cout<<" "<<obj2.a<<endl;
A. 10 10
B. 编译错误缺少拷贝构造函数
C. 10随机数
D. 随机数随机数
[单项选择]下列程序的输出结果是
#include
class Myclass
public:Myclass(int i=0,intj=0)
x=i;
y=j;
void show( ) cout < < "x=" < < x < < " " < "y=" < < y < < end1;
void show( )const cout < < "x=" < < " " < < "y=’ < < y < < end1;
privated:
int x; int y;
;
void main( )
Myclass my1(3,4);
const my2(7,8);
my1.show( );my2.show( );
A. x=4,y=3;x=7,y=8
B. x=3,y=4;x=7,y=8
C. x=7,y=8;x=4,y=3
D. x=8,y=7;x=7,y=8
[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]下面程序的输出结果是
#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( )
D d;
A. constructA
B. constructA
C. constructA
D. constructA
[填空题]以下程序的执行结果是______.
#include<<iostream.h>
c1ass A
public:
virtual void funl ( ) cout<<"A fun1"<<endl;
virtual void fun2 ( ) cout<<"A fun2"<<endl;
void fun3 ( ) cout<<" A fun 3 "<<endl:)
void fun4 ( ) cout<<" A fun4 "<<endl:
;
class B: public
public:
virtual void funl( ) cout<<" B funl"<<end1;
virtual void fun2 (int x) Cout<<"B fun2 "<<endl;
virtual void fun3( ) cout<<"B fun 3"<<endl;
void fun4( ) cout<<"B fun4"<<endl;
;
void main( )
A*p;
B b;
P=&b;
P->funl ( );
P->fun2( );
P->fun3( );
P->fun4( ):
[单项选择]下列程序执行的结果是( )。
public class Test
public static void main(String[ ] args)
int i, j, k;
for(int n=100; n<=200; n++ )
i = n/100;
j = n/10-i* 10;
k = n%10;
if(n == Math. pow(i, 3) + Math. pow(j, 3) + Math. pow(k, 3))
System. out. println(n);
A. 153
B. 167
C. 173
D. 137
[单项选择]下列程序的执行结果是 public class Testff public static void main(String args[]) String sl=new String("I am boy"); String s2=new String("I am boy"); System.out.println(sl==s2);
A. true
B. false
C. "I am boy"
D. 都不正确
[单项选择]下列程序的执行结果是 public class Testhh public static void main(String args [] ) Strings1=new String("I am boy"); Strings2=new String("I am boy"); System.out.println(s1.equals(s2));
A. true
B. false
C. I am boy
D. 都不正确
[单项选择]下列程序的执行结果是 ( )
public class Test
public int aMethod( )
satic int i=0;
i++;
System.out.println(i);
public static void.main(String args[])
Test test=new Test( );
test.aMethod( );
A. 编译错误
B. 0
C. 1
D. 运行成功,但不输出
[单项选择]以下程序执行结果是 ( )。
#include <iostream.h>
class Base
public
virtual void fun( ) cout<<"B";
;
class Derived
public:
Derived( ) cout<<"D";
virtual void fun( ) Base::fun( ); cout<<"C";
int main ( )
Base *ptr;
Derived obj;
ptr=&obj;
p->fun ( );
return 0;
A. DBC
B. DCB
C. BDC
D. CBD
[单项选择]下面程序执行后,输出的结果是( )。 public class Test { public static void main (String[] )args) { boolean m=true; if(m==false) System.out.println("假"); else if(m====true) System.out.println("真"); else System.out.println ("错误"); } }
A. 真
B. 假
C. 错误
D. 编译出错
[单项选择]下列程序的执行结果是 ( )
public class ex68
public static void main(String[]args)
ex68 obj=new ex68( );
int s=0;
for(int i=1;i<=4;i++)
s+=obj.method(i);
System.out.println(s);
public int method(int n)
if(n==1)
return 1;
else
return n*method(n-1);
A. 3
B. 9
C. 33
D. 153