import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 *
 * @author CAN
 */

public class Main {


public static int validate(String input){
try
{
int output = Integer.parseInt (input);
return output;
}
catch (Exception e){
System.out.println(e.getMessage());
return -1;
}
} //end validate function

/**
* @param args
*/
public static void main(String[] args) throws IOException{
// TODO Auto-generated method stub


BufferedReader br = new BufferedReader (new InputStreamReader(System.in));//read the input from console

while(true){

System.out.print ( "\nNumara girin: " );

String input1 = br.readLine();

System.out.print ( "\n Numara girin: " );

String input2 = br.readLine();

int num1 = validate(input1);

int num2 = validate(input2);

if(num1 == -1 || num2 == -1){
System.out.println("Dogru int değeri girin...");
}
else{

System.out.println("\n1.Topla\n2.Çıkar\n3.Çarp\n4.Divide\n5.Çık");

System.out.print( "Seçim belirtin : ");

int option = Integer.parseInt(br.readLine());

switch(option){

case 1:

double addAnswer = num1 + num2;



break;

case 2:

int subAnswer = num1 - num2; value

System.out.println(num1+" - "+num2+" = "+subAnswer);

break;

case 3:

int mulAnswer = num1 * num2;

System.out.println(num1+" * "+num2+" = "+mulAnswer);

break;

case 4:


if(num2 != 0){

double divAnswer = (double)num1 / (double)num2;
double

System.out.println(num1+" / "+num2+" = "+divAnswer);

}else{

System.out.println ("Division by zero is not allowed!");
}

break;

case 5:

System.exit(0);

default:

System.out.println("Seçim yapınız...");

}
}


}

}
}