更多"以下程序的执行结果是______. #include c1ass "的相关试题:
[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
[单项选择]以下程序执行后的输出结果是 #include <iostream> using namespace std; void try(int,int,int,int); int main ( ) { int x,y,z,r; x =1 ; y = 2; try(x,y,z,r); cout<<r<<endl; return 0; } void try(int x,int y,int z,int r) { z = x+y; x = x*x; y = y*y; r = z+x+y; }
A. 18
B. 9
C. 10
D. 不确定
[单项选择]以下程序执行后的输出结果是
#include<iostream>
using namcspace std;
void try(int,int,int,int);
int main( )
int x,y,z,r;
x=1;
y=2;
try(x,y,z,r);
cout<<r<<end1;
return 0;
void try(int x,int y, int z,int r)
z = x+y;
x = x*x;
y = y*y;
r = z+x+y;
A. 18
B. 9
C. 10
D. 不确定
[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]以下程序执行后的输出结果是( )。
#include <iostream>
using namespace std;
void try(int,int,int,int);
int main ( )
int x,y,z,r;
x=1;
y=2;
try(x,y,z,r);
cout<<r<<end1;
return 0;
void try(int x,int y, int z,int r)
z = x+y;
x = X*X;
y = y*y;
r = z+x+y;
A. 18
B. 9
C. 10
D. 不确定
[单项选择]以下程序执行后的输出结果是( )。 #include<iostream> using namespace std; void try(int,int,int,int); int main( ) { int x,y,z,r; x=1; y=2; try(x,y,z,r); cout<<r<<endl; return 0; } void try(int x,int y, int z,int r) { z = x+y; X = x*x; y = y*y; r = z+x+y; }
A. 18
B. 9
C. 10
D. 不确定