How to Read and Write from a file and store the read data into another file

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How to Read and Write from a file at once and store the read data into another file.Please anybody help me..

Posted 25-Feb-14 23:42pm

debarunb

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OriginalGriff 26-Feb-14 6:05am

This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind.
What kind of file(s) are we talking about? What kind of data?
What have you tried? Where are you stuck?
Use the "Improve question" widget to edit your question and provide better information.

debarunb 26-Feb-14 6:44am

Thanks for ur comment.Actually data is coming from one hardware interface.I want to write that data into a file and read that data from same file and write into another file. But I want read and write operation happens at simultaneously.

debarunb 26-Feb-14 7:04am

The data is in ASCII format

debarunb 26-Feb-14 8:05am

Actually data is coming from one hardware interface.I want to write that data into a text file and read that data from that file and write into another text file. But I want read and write operation happens simultaneously i.e. these two process(Read and Write) work at once ..My data is in simple character format.Sir please reply..My English is not good so please co-operate with me :)

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zehs_sha · Accepted Answer · 2014-02-26T02:14:00

//Open a file
//you first operation generally performed on an object of one of these classes is to associate it to a real file
//text file streams are those where the ios::binary flag is not included in their opening mode. 
// and then writing on a text file
#include <iostream>
#include <fstream>
using namespace std;


int main () {
  string line;
  ifstream myfile ("read.txt");
  ofstream writefile;
  
  if (myfile.is_open())
  {
    writefile.open ("write.txt");
    while ( getline (myfile,line) )
    {
      cout << line << '\n';
	  writefile << line << '\n';
    }
	writefile.close();
    myfile.close();
  }
  else cout << "Unable to open file"; 
  return 0;
}