import java.util.*;
public class TestExceptions {



	public static double divide(int x, int y)
				   throws Exception {

	   if(y==0)
	      throw new Exception("Can't perform " + x + "/0");
	
	   return (double)x/y;
	}


	public static void main(String[] args) {

	   Scanner input = new Scanner(System.in);

	   
           while(true) {

	      System.out.print("Enter a number: ");

	      int first = input.nextInt();

	      System.out.print("Enter another number: ");
	
	      int second = input.nextInt();

		if(first==0 && second==0)
		     break;
	      try {

	         double result = divide(first, second);

		 System.out.println(first + "/" + second
			             + " = " + result);

	      }catch(Exception e) {
	   
                 System.err.println(e.getMessage());

	      }
              


	   }
     }

     /*
     int first = input.nextInt();
     int second = input.nextInt();
      while(first!=0 || second!=0) {

          ...

          first = input.nextInt();

        */
}