更多"有以下程序: #include <iostream> #inc"的相关试题:
[单项选择]有以下程序:
#include <iostream>
#include <cstdlib>
using namespace std;
int main( )
int arraysize;
int *array;
cout<<"Please input the size of the array:";
cin>>arraySiZe;
array=new int[arraysize];
if(array==NULL)
cout<<"allocate Error/n";
exit(1);
for(int i=0;i<arraysize;i++)
array[i]=i*i;
int j;
cout<<"which element you want to check:";
cin>>j;
cout<<array[j]<<end1;
return 0;
执行程序输入:10<空格>5,则输出结果为( )。
A. allocate Error
B. 1
C. 0
D. 25
[单项选择]有以下程序
#include <iostream>
#include <string>
using namespace std;
class base
private:
char baseName[10];
public:
base( )
strcpy(baseName,"Base");
virtual char *myName( )
return baseName;
char *className( )
Return baseName;
;
class Derived: public base
private:
char derivedName[10];
public:
Derived( )
strcpy(derivedName,"Derived" );
char *myName( )
return derivedName;
char *className( )
return derivedName;
;
void showPtr(base &p)
cout<<p.myName( )<<" "<<p.className( );
int main( )
base bb;
Derived dd;
showPtr(dd);
return 0;
运行后的输出结果为
A. Derived Base
B. Base Base
C. Derived Derived
D. Base Derived
[单项选择]有以下程序
#include<iostream>
#include<string>
using namespace std;
class base
private:
charbaseName[10];
public:
base( )
strcpy(baseName,"Base");
virtual char*myName( )
return baseName;
char *className( )
return baseName;
;
class Derived: public base
private:
char derivedName[10];
public:
Derived( )
strcpy(derivedName,"Derived");
char *myName( )
return derivedName;
char *className( )
return derivedName;
;
void showPtr(base &p)
cout<<p.myName0<<" "<<p.className( );
int main( )
base bb;
Derived dd;
showPtr(dD) ;
retum 0;
动行后的输出结果为
A. Derived Base
B. Base Base
C. Derived Derived
D. Base Derived
[单项选择]有以下程序:
#include 〈iostream〉
#include 〈string〉
using namespace std;
class visited
private:
int number;
char *name;
public:
static int glob;
void set mes(char *
[单项选择]有以下程序:
#include <iostream>
#include <math>
using namespace std;
class point
private:
double x;
double y;
public:
point(double a,double b)
x=a;
y=b;
friend double distance(point a,point b) ;
;
double distance(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 pl(1,2);
point p2 (5, 2);
cout<<distance (pl,p2) <<end1;
return 0;
程序运行后的输出结果是( )。
A. 1
B. 5
C. 4
D. 6
[填空题]有以下程序:
#include <iostream>
#include <fstream>
using namespace std;
int main( )
fstream file;
file.open("abc.txt", ios_base::in);
if (! file )
cout<<"Can not open abc.txt"<<end1;
abort( );
char ch;
int i = 0;
while ( ! file.eof( ) )
file.get(ch);
i++;
cout<<"Characters : "<<i<<end1;
file.close( );
return 0;
程序实现的功能是 【15】 。
[单项选择]以下程序的输出结果是( )。 #include<iostream> #include<stdlib> using namespace std; void func(char **m) { ++m; cout<<*m<<endl; } main( ) { static char *a[]={"MORNING","AFTERNOON","EVENING"); char **n; n=a; func(n); system("PAUSE"); return 0; }
A. 为空
B. MORNING
C. AFTERNOON
D. EVENING
[单项选择]有以下程序 #include <iostream> #include <string> using namespace std; class base { private: char baseName[10]; public: base ( ) { strcpy(baseName,"Base"); } virtual char *myName( ) { return baseName; } char *className( ) { return baseName; } }; class Derived : public base { private: char derivedName[10]; public: Derived( ) { strcpy(derivedName,"Derived"); } char *myName( ) { return derivedName; } char *className( ) { return derivedName; } }; void showPtr(base &p) { cout<<p.myName ( ) <<" "<<p.className ( ); } int main ( ) { base bb; Derived dd; showPtr(dd); return 0; } 运行后的输出结果为
A. Derived Base
B. Base Base
C. Derived Derived
D. Base Derived
[填空题]有以下程序:
#include <iostream>
#include <fstream>
using namespace std;
int main( )
{
fstream file;
file.open("abc.txt", ios_base::in);
if (! file )
{
cout<<"Can not open abc.txt"<<end1;
abort( );
}
char ch;
int i = 0;
while ( ! file.eof( ) )
{
file.get(ch);
i++;
}
cout<<"Characters : "<<i<<end1;
file.close( );
return 0;
}
程序实现的功能是 【15】 。