Mega Code Archive

 

Categories / C++ Tutorial / File Stream

 

Copying one file into another

#include <iostream> #include <fstream>                                                      #include <cstdlib> using namespace std;                                                    void print_error(const char*, const char* = " ");                       int main(int argc, char* argv[])                                        {      if (3 != argc)          print_error("usage: copy source dest");      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");      return 0; } void print_error(const char* p, const char* p2) {                            cerr << p << ' ' << p2 << '\n';                                         exit(1);                                                           }