public static void Main()
var M1 =int.Parse(Console.ReadLine());
var M2 = int.Parse(Console.ReadLine());
Console.Write ("Въведете знак: +, -, *, /, или §");
var Terminator=char.Parse(Console.ReadLine());
case '+':{Console.WriteLine("(0)+(1)=(2)",M1,M2,M1+M2);};break;
case '-':{Console.WriteLine("(0)-(1)=(2)",M1,M2,M1-M2);};break;
case '*':{Console.WriteLine("(0)*(1)=(2)",M1,M2,M1*M2);};break;
case '/':{if (M2==0) Console.WriteLine("Cannot divide {0} by zero",M1);
else Console.WriteLine("{0} / {1} = {2}",M1,M2,M1 / M2);break;
case '§': {if (M2==0) Console.WriteLine("Cannot divide {0}by zero",M1 );
else Console.WriteLine("{0} § {1} = {2}",M1,M2,M1 § M2);break;
default: {Console.WriteLine(" Невалиден знак ");};break;