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发布时间:2024-05-29 19:13:42

[填空题]有以下程序:
#include <iostream>
#include <fstream>
using namespace std;
int main( )

ofstream ofile("D://test.txt");
if(!ofile)

cout<<"test.txt can’t open"<<end1;
return 0;

ofile<<"This book is C++"<<" "<<12345<<end1;
ofile.close( );
ifstream ifile("D://test.txt");
if ( ! ifile)

cout<<"test.txt can’t open"<<end1;
return 0;

char str[80];
ifile>>str;
ifile.close( );
cout<<str<<end1;
return 1;

程序执行后的输出结果是 【15】

更多"有以下程序: #include <iostream> #inclu"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_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> #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( );

[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]有如下程序:
#include <iostream>
#include <iomanip>
using namespace std;
class CSum
int x,y;
public:
CSum(int x0,int y0):x(x0),y(y0)
friend ostream& operator<<(ostream & os, const CSum& x
[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

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