public class Calculator {
	 /** Main method */
	 public static void main(String[] args) {
		 // Check number of strings passed
		 if (args.length != 3) {
			 System.out.println(
			 "Usage: java Calculator operand1 operator operand2");
			 System.exit(0);
		 }

		// The result of the operation
		 int result = 0;

		 // Determine the operator
		 switch (args[1].charAt(0)) {
			 case '+': result = Integer.parseInt(args[0]) +
			 Integer.parseInt(args[2]);
			 break;
			 case '-': result = Integer.parseInt(args[0]) -
			 Integer.parseInt(args[2]);
			 break;
			 case '.': result = Integer.parseInt(args[0]) *
			 Integer.parseInt(args[2]);
			 break;
			 case '/': result = Integer.parseInt(args[0]) /
			 Integer.parseInt(args[2]);
		}

		// Display result
		System.out.println(args[0] + ' ' + args[1] + ' ' + args[2]
		+ " = " + result);
	}
}