// A program that uses rational class

import java.io.*;
import rational;

class use_rational {

  public static void main (String[] args) throws IOException {

    int a, b, c, d;

    BufferedReader stdin;
    stdin = new BufferedReader (new InputStreamReader (System.in));

    System.out.println ("Enter four integers on separate lines: ");
    a = Integer.parseInt (stdin.readLine());
    b = Integer.parseInt (stdin.readLine());
    c = Integer.parseInt (stdin.readLine());
    d = Integer.parseInt (stdin.readLine());

    rational p = new rational(a,b); // p points to a new instance of rational
    rational q = new rational(c,d); // q points to a new instance of rational

    rational r = p.sum(q); // no need of new here, sum returns a new ratonal object

    System.out.println(p.str() + " + " + q.str() + " = " + r.str());

    r.reduce();

    System.out.println("Reduced sum is: " + r.str());

  }
}