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Copy the contents of one file to another



WAP to copy the contents of one file to another. Use command line arguments.


#include <iostream>
#include <fstream>                                                    
#include <cstdlib>
using namespace std;                                                  

void print_error(const char*, const char* = " ");                    

void main(int argc, char* argv[])                                      
{
     if (3 != argc)
         print_error("usage: copy source file to destination file");

     ifstream in( argv[1], ios::binary );                            
     if (!in)
          print_error( "can't open", argv[1] );

     ofstream out( argv[2], ios::binary );                            
     if (!out)
          print_error( "can't open", argv[2] );

     char ch;                                                        
     while ( in.get(ch) )                                            
          out.put( ch );                                              
     if ( !in.eof() )                                                
          print_error("something strange happened");
   
system("pause");
}
void print_error(const char* p, const char* p2) {                    
     cerr << p << ' ' << p2 << '\n';
system("pause");
     exit(1);                                                        
}
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