更多"下面程序的结果是 #include<iostream.h> cla"的相关试题:
[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
t 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]下列程序的运行结果是() #include<iostream.h> class A { int a; public: A( ) {a=0;} A(int aa) { a=aa; cout < < a++; } }; void main( ) A x,y(2) ,z(3) ; cout < < endl; }
A. 00
B. 23
C. 34
D. 25
[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]下面程序的结果为
#include<iostream.h>
int c;
class A
private:
int a;
static int b;
public:
A( ) a=0;c=0;
void seta( ) a++;
void setb( ) b++;
void setc( ) c++;
void display( ) cout < < a < < " " < < b < < " " < < c;
;
int A: :b=0;
void main( )
[单项选择]下面程序的结果为 #include<iostream.h> int C; class A { private: int a; static int b; public: A( ) {a=0;c=0;} void seta( ){a++;} voidsetb( ){b++;} voidsetc( ){c++;} void display( ) {cout << a << " " << b << “ ” << c;} }; int A∷b=0; void main( ) { A a1,a2; a1.seta( ); a1.setb( ); a1.setc( ); a2.seta( ); a2.seth( ); a2.setc( ); a2.display( ); }
A. 1 2 1
B. 1 2 2
C. 1 1 2
D. 2 2 2
[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
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