5.4ConditionalStatements_MultiplicationSign

using System;

class MultiplicationSign
{
    static void Main ()
    {
        Console.Write("Please, enter the First real number, A = ");
        string numberStr = Console.ReadLine();
        decimal numA = decimal.Parse(numberStr);
        Console.Write("Enter the Second real number, B = ");
        numberStr = Console.ReadLine();
        decimal numB = decimal.Parse(numberStr);
        Console.Write("Enter the Third real number, C = ");
        numberStr = Console.ReadLine();
        decimal numC = decimal.Parse(numberStr);

        char signNum;
        if (numA != 0 && numB != 0 && numC != 0)
        {
            if ((numA > 0 && numB > 0 && numC > 0) || (numA > 0 && numB < 0 && numC < 0)
                || (numA < 0 && numB > 0 && numC < 0) || (numA < 0 && numB < 0 && numC > 0))
            {
                signNum = '+';
            }
            else
            {
                signNum = '-';
            }
        }
        else
        {
            signNum = '0';
        }
        Console.WriteLine("The Sign of Multiplication of these 3 numbers is: SIGN = {0} !",
            signNum);
        Console.ReadLine();
    }
}