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

#define SIZE 512
 
int main (int argc, char *argv[]) {  
  string filename;
  cout << "Enter input filename: ";
  cin >> filename;
  ifstream infile(filename.c_str());
  if (!infile.is_open()) {
    cout << "[Read] Unable to open " << filename;
    return -1;    
  }
  
  cout << "Enter output filename: ";
  cin >> filename;
  ofstream outfile(filename.c_str(), ios::trunc);
  if (!outfile.is_open()) {
    cout << "[Write] Unable to open " << filename;
    return -1;    
  }
  
  char buf[SIZE];  
  while(!infile.eof()) {
    infile.read(buf, SIZE);    
    outfile.write(buf, infile.gcount());
  }
  infile.close();
  outfile.close();
}