Numbers in text file problem

[Eddy070792]

Hi guys.I need to copy data from one text file to another.This is how data in file looks like:

2 -3 8 5 0
3 5 1
2 -2 3 1 7 6
5 -3 15 0 1 

I succesfully managed to copy those numbers but with one mistake.The last number is written twice.No matter what I am doing,I cant repair it.I would be really thankfull if you could help me to solve this.My output file looks like this:

2 -3 8 5 0
3 5 1
2 -2 3 1 7 6
5 -3 15 0 1 1

This is my code:

    
    int a;
    string str;
    stringstream line;

    ifile.open("input.txt",fstream::in);
    ofile.open("output.txt",fstream::out | fstream::trunc);

    while ( ! ifile.eof() )     
    {
              getline(ifile,str);
              if(ifile.eof()){
                   break
              }
              else{
                   line << str;   
                   while( !line.eof() ){
                          line >> a;
                          ofile << a << " ";
                   }
                   ofile << endl;
                   line.clear();
                   line.str(""); 
              }
          
    }

    ifile.close();
    ofile.close();

[JLBorges]

#include <iostream>
#include <fstream>
#include <string>

int main() // copy file "input.txt" to "output.txt"
{
    std::ifstream ifile( "input.txt" ) ;
    std::ofstream ofile( "output.txt" ) ;
    
    /* either */ std::string str ;
    while ( std::getline( ifile, str ) ) ofile << str << '\n' ;

    /* or */ ofile << ifile.rdbuf() ;
}

[Eddy070792]

Sorry,I forgot to mention this,but I need to do some operations with those numbers afterwards ,that is why I copy only one character each time,not the whole string...anyway thanks for trying.

[Smac89]

Try using fgetc(), fscanf(), sscanf(), fgets(). These all work for reading data from files