Unbenannt

import java.util.Scanner;

public class Calculator{
	
	public static void main (String args[]) {
		
		Scanner s = new Scanner(System.in);
		
		boolean error = false;
		int a = 0;
		int b = 0;
		char operator;
		int sum = 0;
		
			if ( s.hasNextInt()) {
				a = s.nextInt();
			}else{
			error=true;
			}
			
			if ( s.hasNextInt()) {
				b = s.nextInt();
			}else{
				error=true;
			}
			
			operator =s.next().charAt(0);
		
			if (operator  == '+'){
					sum = a + b;
			}
			
			else if (operator  == '-'){
				sum = a - b;
			}
			
			else if (operator  == '*'){
				sum = a * b;
			}
			
			else if (operator  == '/'){
				sum = a / b;
			}else{
				error = true;
			}
			
			if (error){
				System.out.println("FALSCHE EINGABE");
			}else{
				System.out.println(sum);
			}
	}
}