更多"有以下程序:
#include <iostream>
#inc"的相关试题:
[填空题]有以下程序:
#include<iostream>
#include<fstream>
using namespace std;
int main( )
fstream file;
file.open("abc.txt", ios :: in);
if ( !file )
cout<<"Can not open abc.txt"<<end1;
abort( );
char buf[ 80 ];
int i = 0;
while (!file.eof( ))
file.getline(buf,80);
i++;
cout<<"Lines :"<<i<<end1;
file.close( );
return 0;
程序实现的功能是 【15】 。
[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】 。
[填空题]有以下程序:
#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
int main( )
{
fstream filel,file2;
char line[100];
filel.open("source.txt",ios::in);
if(!file1)
{
cout<<"Can’t open file source.txt!"<<end1;
abort( );
}
file2.open("dest.txt",ios::out);
if(!file2)
{
cout<<"Can’t open file dest.txt!"<<end1;
abort( );
}
while(!file1.eof( ))
{
filel.getline(1ine,100);
file2<<line;
file2<<end1;
}
filel.close( );
file2.close( );
return 0;
}
此程序实现的功能是 【15】 。
[填空题]有以下程序:
#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
int main( )
fstream filel,file2;
char line[100];
filel.open("source.txt",ios::in);
if(!file1)
cout<<"Can’t open file source.txt!"<<end1;
abort( );
file2.open("dest.txt",ios::out);
if(!file2)
cout<<"Can’t open file dest.txt!"<<end1;
abort( );
while(!file1.eof( ))
filel.getline(1ine,100);
file2<<line;
file2<<end1;
filel.close( );
file2.close( );
return 0;
此程序实现的功能是 【15】 。
[填空题]有如下的程序:
#include<iostream>
#include<fstream>
using namespace std;
int main( )
char s[25]="Programming language";
ofstream f1("DATA. TXT");
f1<<"C++Programming";
f1.close( );
ifstream f2("DATA.TXT");
if(f2.good( ))f2>>s;
f2.close( );
cout<<s;
return 0;
执行上面的程序将输出______。
[填空题]有如下的程序:
#include<iostream>
#include<fstream>
using namespace std;
int main( )
char s[25]="Programming language";
ofstream f1("DATA.TXT");
f1<<"C++Programming";
n.close( );
ifstream f2("DATA.TXT");
if(f2.good( ))f2>>s;
f2.close( );
cout<<s;
return 0;
执行上面的程序将输出 ______。
[简答题]#include<iostream>
#include<fstream>
#include<string>
using namespace std;
class A
public:
A(const char*na)strcpy(name,na);
private:
char name[80];
;
class B:public A
public:
B(const char*nm):A(nm)
void show( );
;
void B::show( )
cout<<"name:"<<name<<endl;
void main( )
B b1("B");
b1.show( );
[填空题]有以下程序:
#include <fstream>
#include <string>
using namespace std;
int main ( )
{
char ch[] = "The end";
ofstream outstr( "d://put.txt", ios_base: :app);
for (int i = 0; i < strlen( ch ); i++ )
outstr.put(ch[i]);
outstr.close( );
return 0;
}
程序实现的功能是 【15】 。
[填空题]有以下程序:
#include <fstream>
#include <string>
using namespace std;
int main ( )
char ch[] = "The end";
ofstream outstr( "d://put.txt", ios_base: :app);
for (int i = 0; i < strlen( ch ); i++ )
outstr.put(ch[i]);
outstr.close( );
return 0;
程序实现的功能是 【15】 。
[填空题]有以下程序:
#include<fstream>
#include<string>
using namespace std;
int main( )
char ch[]="The end";
ofstream outstr("______",ios_base::app);
for(int i=0;i<strlen(ch); i++) outstr.put(ch[i]);
outstr.close( );
return 0:
若程序实现的功能是在文件d:/put.txt的尾部追加写入一串字符,试将程序补充完整。
[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: 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 <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