Save char array to a file : ofstream « File Stream « C++ Tutorial






  1. C++ Tutorial
  2. File Stream
  3. ofstream
#include<iostream.h>
#include<fstream.h>

main()
{
  ofstream out("test.txt");
  if(! out)
  {  
    cout<<"Cannot open output file\n";
       return 1;
  }
  char nums[4]={'a','b','c','d'};
  out.write((char *)nums,sizeof(nums));
  out.close();

  ifstream in("test.txt");
  if(! in)
  {  
    cout<<"Cannot open input file\n";
       return 1;
  }
  in.read((char *)& nums,sizeof(nums));

  for(int i=0;i<4;i++)
    cout<<nums[i]<<' ';
  cout<<'\n';
  cout<<in.gcount()<<"characters read\n";
  in.close();
  return 0;
}

a b c d
4characters read




12.10.ofstream
12.10.1.Save char array to a file
12.10.2.Read char array from a file
12.10.3.Writing on a text file
12.10.4.Writing numbers to a file
12.10.5.ofstream: seek from beginning
12.10.6.Save and read double array in a binary file
12.10.7.Save and read structure
12.10.8.Save chars to a binary file
12.10.9.Demonstrate peek(), unget(), and ignore().
12.10.10.Create a sequential file.