Console_binary_calc.cs

using System;

class binaryCalc {
	static char[] operations = {'+', '-', '*', '/'};

	static string getOperation(string str) {
		foreach (char operation in operations) {
			if (str.IndexOf(operation) != -1) {
				return new String(operation, 1);
			}
		}

		return null;
	}

	static int Main() {

		string input, operation;
		string[] ab;

		int a, b, result = 0;

		bool imposibleOperation = false;

		Console.Write(">");

		while (true) {
			input = Console.ReadLine();
			if (input != "") {
				operation = getOperation(input);
				ab = input.Split(operation[0]);

				a = Convert.ToInt32(ab[0], 2);
				b = Convert.ToInt32(ab[1], 2);

				switch(operation) {
					case "+" : result = a + b; break;
					case "-" : result = a - b; break;
					case "*" : result = a * b; break;
					case "/" : 
						if (b != 0) {
							result = a / b;
							} else {
								Console.WriteLine();
								Console.ForegroundColor = ConsoleColor.Red;
								Console.WriteLine("can't divide by zero");
								Console.ForegroundColor = ConsoleColor.White;
								imposibleOperation = true;
							}
						 break;
				}

				if (!imposibleOperation) {
					Console.WriteLine();
					Console.ForegroundColor = ConsoleColor.Cyan;
					Console.WriteLine(Convert.ToString(result, 2) + " | " + result);
				}
				
				Console.ForegroundColor = ConsoleColor.White;
				Console.WriteLine();
				Console.Write(">");

				imposibleOperation = false;

			} else {
				Console.Write(">");
			}
		}
	}
}