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发布时间:2024-07-26 05:56:38

[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

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
[填空题]有以下程序:
#include <iostream>
#include <string>
using nameSpace std;
class person

int age;
Char * name;
public:
person ( int i, Char * str )

int j;
j = strlen( str ) + 1;
name = new char[ j ];
strcpy( name, str );
age = i;

~person( )

delete name;
cout<<"D";

void display( )

cout<<name<<":"<<age;


int main( )

person demo( 30,"Smith" );
demo.display( );
return 0;

则该程序的输出结果为: 【13】
[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]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 <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
[单项选择]有以下程序:
#include <iostream>
#include <cmath>
using namespace std;
class Distance;
class point

public:
friend class Distance;
Point(int a,int B)

x=a;
Y=b;

void Print( )

cout<<"X= "<<X<<end1;
cout<<"Y= "<<Y<<end1;

private:
float X,Y;

class Distance

public:
float Dis(Point &p,Point &q);

float Distance :: Dis(Point &p,Point &q)

float result;
result=sqrt((p.X-q.X)*(p.X-q.X)+(p.Y-q.Y)*(p.Y-q.Y));
cout<<result<<end1;
retUrn result;

int main( )

Point p(10,10),q(10,30);
Distance d;
d.Dis(p,q);
return 0;

运行后的输出结果是( )。
A. 10
B. 30
C. 0
D. 20
[单项选择]有以下程序: #include <iostream> #include <fstream> using namespace std; int main ( ) { ofstream ofile; char ch; ofile.open ("abc.txt"); cin>>ch; while (ch!=’#’ ) { cin>>ch; ofile.put(ch); } ofile.close( ); return 0; } 当从键盘终端连续输入的字符为a、b、c和#时,文件abc.txt中的内容为( )。
A. 程序编译时出错
B. abc#
C. abc
D. #
[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 p1(1,2); point p2(5,2); cout<<distance(p1,p2)<<end1; return 0; } 程序运行后的输出结果是
A. 1
B. 5
C. 4
D. 6
[单项选择]有以下程序: #include<iostream> #include<string> using namespace std; int main( ) { char arr[2][4]; strcpy(arr[0],"you"); strcpy(arr[1],"me"); arr[0][3]=’&’; cout<<arr[0]<<end1; return 0; } 执行后的输出结果是( )。
A. you&me
B. you
C. me
D. err
[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 *

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