/**
 * an application which adds or multiply two numbers
 *
 * @version	$Id: Op.java,v 1.1.2.1 2003/10/29 22:12:20 nthiery Exp $
 * @author	Nicolas M. Thiéry <nthiery@users.sourceforge.net>
**/

public class Op {
    
    public static void main(String[] args) {
	if (args.length!=3) {
	    System.err.print("Usage: java Somme + 2 5\n");
	} else {
	    int x=Integer.parseInt(args[1]);
	    int y=Integer.parseInt(args[2]);
	    if (args[0].equals("+")) {
		System.out.println(""+(x+y));
	    } else if (args[0].equals("*")) {
		System.out.println(""+(x*y));
	    } else {
		System.err.println("Unknown operator: "+args[0]);
	    }
	}
    }
    
}