更多"下面程序的结果是 #include<iostream.h> c"的相关试题:
[单项选择]下面这个程序的结果是
#include<iostream.h>
class A
private:
int a;
public:
void seta( );int geta( );;
void A∷seta( )
a=1;
int A∷geta( )
return a;
class B
pnvate:
int a;
publiC://
void sera( );int geta( );;
void B∷seta( )
a = 2;
int B∷geta( )
return a;
class C://public A,public B
private:
int b;
public:
void display( );;
void C∷display( )
int b=geta( );
cout<<b;
void main( )
C c;
c.seta( );
c.display( );
A. 1
B. 2
C. 随机输出1或2
D. 程序有错
[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 Destructor is active Destructor is active Destructor is active
B. Exiting main Destructor is active Destructoris active
C. Exiting main Destructoris active
D. Exiting main
[简答题]给出下面程序的输出结果。
#include<iostream.h>
class A
private:
int a;
public:
void set(int x)a=x;
void show( )cout<<"a:"<<a<<",";
;
class B:public A
private:
int b;
public:
void set(int x=0)A::set(x);b=x+10;
void set(int x,int y)A::set(x);b=y;
void show( )A::show( );cout<<"b="<<b<<endl;
;
void main( )
B b;
b.set(10);b.show( );
b.set(30,50);b.show( );
[填空题]根据输出结果填空完成下面程序。
#include<iostream.h>
class Test
private:
static int val;
int a;
public:
static int func( );
void sfunc(Test &r);
;
______//初始化静态变量val
int Test::func( )
return val++;
void Test::sfunc(Test &r)
r.a=125;
cout<<"Result3="<<r.a;
void main( )
cout<<"Resultl="<<Test::func( )<<endl;
Test A;
cout<<"Result2="<<A.fune( )<<endl;
A. sfunc(A);
输出结果为:
Result1=201
Result2=202
Result3=125
[单项选择]下面程序的结果是
#include<iostream.h>
class A
public:
A( ) cout < < "construtA" < < end1;
virtual ~A( ) cout < < "destructA" < < end1; ;
class B:public A
;
class C://public A
;
class D://public B,public C
;
void main( )
Dd;
A. constructA
B. constructA
C. constructA
D. constructA
[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 (intb) a=b++;
void print ( )a=a+1; cout << a <<" ";
void print ( ) const cout << 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]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) ㈠
voidshowa( )cout<<a;
;
voidmain( )
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 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) ㈠ voidshowa( ){cout<<a;} }; voidmain( ) { C c; c.showa( ); }
A. 1
B. 2
C. 3
D. 程序有错误