java calculator

    /*
     * TiK's calculator complete revision
     * 12/19/14 added powers
     */
    import java.util.Scanner;
    /**
     *
     * @author TiK
     */
    public class calc {
       public static int Two;
       public static float base,power;
       public static float firstAnswer,solution;
        /**
         * @param args the command line arguments
         */
        public static float inputOne,inputTwo;
        public static char[] operation;



        public static void main(String[] args) {
            String stringOperation;


            Scanner input = new Scanner( System.in );
            Scanner op = new Scanner( System.in );


            System.out.print("Enter first number: ");
            inputOne = input.nextFloat();
            System.out.print("\nEnter operation: ");
            stringOperation = op.nextLine();
            System.out.print("\nEnter second number: ");
            inputTwo = input.nextFloat();


            operation = stringOperation.toCharArray();
            solution = mathFunction(inputOne,inputTwo,operation[0]);
            firstAnswer = solution;

            System.out.printf("%.2f %s %.2f = %.2f\n",inputOne,stringOperation,inputTwo,solution);
            for(;;) {

                System.out.print("\nEnter operation: (q to quit): ");
                stringOperation = op.nextLine();
                if(stringOperation.equals("q"))
                    break;
                System.out.print("Enter another number : ");

                inputTwo = input.nextFloat();
                operation = stringOperation.toCharArray();
                firstAnswer = solution;
                solution = mathFunction(firstAnswer,inputTwo,operation[0]);

                System.out.printf("%.2f %s %.2f = %.2f\n",firstAnswer,stringOperation,inputTwo,solution);
            }
        }
        public static float mathFunction(float numberOne,float numberTwo,char operation) {

                    switch (operation)
                    {
                    case '+':
                        return numberOne + numberTwo;
                    case '-':
                        return numberOne - numberTwo;
                    case '*':
                        return  numberOne * numberTwo;
                    case '/':
                        return numberOne / numberTwo;
                    case '%':
                        return numberOne % numberTwo;
                    case '^':
                       return (float)Math.pow(numberOne, numberTwo);
                    default:
                       return numberOne + numberTwo;
                    }
       }

    }