Read char array from a file : ofstream « File Stream « C++ Tutorial

#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.