public class FractionDemo {
  public static void main(String[] Argv) {

    Fraction a = new Fraction();
    System.out.println("a= "+a); // uses toString()

    // a.n=1; a.d=2;
    a.set(1,2);
    System.out.println("a= "+a); // uses toString()
    
    Fraction b = new Fraction(3,5);
    System.out.println("b= "+b); // uses toString()
   
    Fraction c = new Fraction(a); // make a copy of a
    System.out.println("c= "+c);
  
    a.add(b); 

    System.out.println("a= a+b = "+a); // uses toString()
  }

}