更多"下面程序的结果为( )。
#include<iostream"的相关试题:
[单项选择]下面程序的结果为
#include<iostream.h>
intC;
classA
private:
inta;
staticintb;
public:
A( )a=0;c=0;
voidseta( )a++;
voidsetb( )b++;
voidsetc( )c++;
voiddisplay( )cout<<a<<""<<b<<""<<c;
;
intA::b=0;
voidmain( )
Aa1,a2;
a1.seta( );
a1.setb( );
a1.setc( );
a2.seta( );
a2,setb( );
a2.setc( );
a2.display( );
A. 121
B. 122
C. 112
D. 222
[单项选择]下面程序的结果为( )。
#include<iostream.h>
intC;
classA
{
private:
inta;
staticintb;
public:
A( ){a=0;c=0;}
voidseta( ){a++;}
voidsetb( ){b++;}
voidsetc( ){c++;}
voiddisplay( ){cout<<a<<""<<b<<""<<c;}
};
intA::b=0;
voidmain( )
{
Aa1,a2;
a1.seta( );
a1.setb( );
a1.setc( );
a2.seta( );
a2,setb( );
a2.setc( );
a2.display( );
}
[单项选择]下面程序的输出结果是
#include<iostream.h>
#include<string.h>
void main( )
char p1[10],p2[10]
strcpy(p1,"abc");
strcpy(p2,"ABC");
char str[50]="xyz";
strcpy(str+2,strcat(p1,p2));
cout<<str;
A. xyzabcABC
B. zabcABC
C. xyabcABC
D. yzabcABC
[单项选择]下面程序的运行结果为( )。
#include
ClassA
{
public:A( ){cout<<"1";}
~A( ){cout<<"2";}
};
ClassB:public:A
{
public:
B( ){cout<<"3";}
~B( ){cout<<"4";}
};
Voidmain( )
{
Bb;
}
A. 1234
B. 1324
C. 1342
D. 3142
[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>
#include<string.h>
void main( ) char p1[10] ,p2[10] ;
strcpy(p1,"abc") ;
strcpy(p2,"ABC") ;
char str[50] ="xyz";
strcpy(str+2,strcat(p1,p2) ) ;
cout < < str; A) xyzabcABC B) zabcABC C) xyabcABC D) yzabcABC
[单项选择]下面程序的输出结果是( )。
#include<iostream>
#include<string>
using namespace std;
void main( )
charp1[10],p2[10];
strcpy(p1,"abc");
strcpy(p2,"ABC");
charstr[50]="xyz";
strcpy(str+2,strcat(p1,p2));
cout<<str;
A. xyabcABC
B. yzabcABC
C. xyzabcABC
D. zabcABC
[填空题]下面程序的执行结果是 【15】
#include <iostream>
#include <iomanip>
using namespace std;
void main( )cout<<setfill(’x’)<<setw(10);
cout<<"Hello"<<end1;
[单项选择]下面程序的输出结果是( )。
#include<iostream>
#include<math.h>
using namespace std;
class point
private:
double x;
double y;
public:
point(double a,double b)
x=a;
y=b;
friend double distances(point a,point b);
;
double distances(point a,point b)
return sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y));
int main( )
point p1(1,2);
point p2(5,2);
cout<<distances(p1,p2)<<end1;
return 0;
A. 2
B. 4
C. 8
D. 16