shiti10_5_2.cpp

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#include<fstream.h>
#include<fstream.h>
#include<stdlib.h>
void main()
{
  fstream outfile,infile;
  infile.open("data.txt",ios::in);
  if(! infile)
  {
    cout<<"Can't open file."<<endl;
	abort();
  }
  outfile.open("newdata.txt",ios::out);
  if(! outfile)
  {
    cout<<"Can't open file."<<endl;
	abort();
  }
  char buf[80];
  int i=0;
  while (!infile.eof())
  {
	infile.getline(buf,sizeof(buf));
    outfile<<i++<<":"<<buf<<endl;
  }
  infile.close();
  outfile.close();
}