Thread: Problem with detecting Math operation.

Hello,

I am having trouble testing to see what Mathematica operator the user has in-putted.

Here is the function (There are others so don't worry that this wouldn't actually run)

public static void calc()
	{
		Scanner calcinputS = new Scanner(System.in);
		String calcinput, op;
		int answer, fnum, snum;
 
		System.out.println("-------------------------");
		System.out.println("|     Calculator v1.0   |");
		System.out.println("-------------------------");
		System.out.print("  Enter an equation: ");
		calcinput = calcinputS.nextLine();
 
		String[] calcinputA = calcinput.split(" ");
		fnum = Integer.parseInt(calcinputA[0]);
		op = calcinputA[1];
		snum = Integer.parseInt(calcinputA[2]);
 
		if (op == "+")
		{
			answer = fnum + snum;
			System.out.println(answer);
		}
		else if (op == "-")
		{
			answer = fnum - snum;
			System.out.println(answer);
		}
		else if (op == "*")
		{
			answer = fnum * snum;
			System.out.println(answer);
		}
		else if (op == "/")
		{
			answer = fnum / snum;
			System.out.println(answer);
		}
		else
		{
			System.out.println("Error: Could not recognize operation: " + op);
		}
 
	}

Thank you

Ah, Thank you.