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public static void main(String[] args) {

	double num1, num2;
    Scanner scanner = new Scanner(System.in);
    System.out.print("Enter first number:");

    /* We are using data type double so that user
     * can enter integer as well as floating point
     * value
     */
    num1 = scanner.nextDouble();
    System.out.print("Enter second number:");
    num2 = scanner.nextDouble();

    System.out.print("Enter an operator (+, -, *, /): ");
    char operator = scanner.next().charAt(0);

    scanner.close();
    double output;

    switch(operator)
    {
        case '+':
        	output = num1 + num2;
            break;

        case '-':
        	output = num1 - num2;
            break;

        case '*':
        	output = num1 * num2;
            break;

        case '/':
        	output = num1 / num2;
            break;

        /* If user enters any other operator or char apart from
         * +, -, * and /, then display an error message to user
         * 
         */
        default:
            System.out.printf("You have entered wrong operator");
            return;
    }

    System.out.println(num1+" "+operator+" "+num2+": "+output);
}