working with file

[Mohammad Zolfaghari]

Hi
In this code i should reverse the things that are in input.txt and put them in output.txt for example if in input i have 123 in out put should become 321 and i want to do it with seekp and seekg so please tell me how should i correct this code so that it gives the correct result

#include<iostream>
#include<fstream>

using namespace std;

int main()
{
	char c;
	int i;
	ifstream fin("input.txt");
	ofstream fout("output.txt");
	for(i=0;fin.eof()==false;i++)
	{
		fin.get(c);
		fin.get();
	}
	i=i-2;
	fin.seekg(0,ios::beg);
	while(i>=0)
	{
		fin.get(c);
		fout.seekp(i);
		fout.put(c);
		cout<<c<<endl;
		i=i-2;
	}
	return 0;
}

[Mohammad Zolfaghari]

sorry but i need the answer fast please someone help

[Moschops]

#include <iostream>
#include <fstream>
using namespace std;

int main () {
  int length;
  
char x;
  ifstream is;
  is.open ("input.txt" );

 
  is.seekg (0, ios::end);
  length = is.tellg();
  
is.seekg (length-2, ios::beg);
 
  is >> x;
  cout << x <<endl;
is.seekg (length-3, ios::beg);
 
  is >> x;
  cout << x <<endl;
is.seekg (length-4, ios::beg);
 
  is >> x;
  cout << x <<endl;


  is.close();

 
  return 0;
}

[Mohammad Zolfaghari]

thanks for your answer but i dont understand what happened on output.txt?

[Moschops]

I didn't do that. I put them to the console. You'll have to look at the code and work out how to change it yourself.

[Mohammad Zolfaghari]

Thank you very much it works now