import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int ans = 0;
while (true) {
System.out.print("Enter ( * + - % / ) or X to exit : ");
char op = in.next().trim().charAt(0);
if(op == '*' || op == '+' || op == '-' || op == '/' || op == '%'){
System.out.print("Enter two numbers : ");
int a = in.nextInt();
int b = in.nextInt();
if(op == '*'){
ans = a * b;
}
if(op == '+'){
ans = a + b;
}
if(op == '-'){
ans = a - b;
}
if(op == '%'){
if(b != 0){
ans = a % b;
}
}
if(op == '/'){
if(b != 0){
ans = a / b;
}
}
}
else if(op == 'x' || op == 'X'){
System.out.print("Exited.");
break;
}else{
System.out.print("Invalid Char");
break;
}
System.out.println("Answer = " + ans + " ");
}
}
}
