import java.util.Scanner;
class Calculator {
	public static void main(String[] args) {

final int HIBUR=1, HISTUR=2, KEFEL=3, HILUK=4, POW=5, SQRT=6, ABS=7;
int	  number3;
double    number1, number2, score, score2;

Scanner scan = new Scanner(System.in);
System.out.println("Please insert two real numbers and one intiger number from 1 to 7 that symbol some math action: );

number1 = scan.nextDouble();
number2 = scan.nextDouble();
number3 = scan.nextInt();

switch(number3)	{
case HIBUR: score = number1 + number2; System.out.print( + number1 + " + " + number2 + " = " + score); break;
case HISUR: score = number2 - number1; System.out.print( + number2 + " - " + number1 + " = " + score); break;
case KEFEL: score = number1 * number2; System.out.print( + number1 + " * " + number2 + " = " + score); break;
case HILUK: score = number1 / number2; System.out.print( + number1 + " / " + number2 + " = " + score); break;
case POW:   score = number1 + number2; score2 = Math.pow(score, 2); System.out.print("squre of " + number1 + "+" + number2 + "is" + score2); break;
case SQRT:  score = Math.sqrt(number1); System.out.print("squre root of " + number1 + "is" + score); break;
case ABS:   score = number2 - number1; score2 = Math.abs(score); System.out.print("absolute of " + number2 + "-" + number1 + "is" + score2); break;
default: System.out.print( num1 + " " + num2 + " " + num3 + " illeagel action code"); break; }
}
}