static void Main(string[] args)
{
decimal numb = 0;
decimal numbB = 0;
string input = "123";
Console.WriteLine("1. Reverses the digits of a number");
Console.WriteLine("2. Calculate the average of a sequence of integers");
Console.WriteLine("3. Solve a linear equation a * x + b = 0");
Console.Write("Please enter your choise: ");
int choice = int.Parse(Console.ReadLine());
Console.Clear();
switch (choice)
{
case 1:
{
do
{
if (numb < 0)
{
Console.WriteLine("Non-negative!!!");
}
Console.Write("Please enter a non-negative number: ");
numb = decimal.Parse(Console.ReadLine());
} while (numb < 0);
Console.WriteLine(ReverseNumber.ReverseNumb(numb));
break;
}
case 2:
{
do
{
if (input.Length < 1)
{
Console.WriteLine("The sequence should not be empty!");
}
Console.Write("Please enter a sequence of numbers: ");
input = Console.ReadLine();
} while (input.Length < 1);
string[] arrAsStr = input.Split(new char[] { ' ', ',' }, StringSplitOptions.RemoveEmptyEntries).ToArray();
int[] arr = new int[arrAsStr.Length];
decimal sum = 0;
for (int i = 0; i < arrAsStr.Length; i++)
{
arr[i] = int.Parse(arrAsStr[i]);
sum += arr[i];
}
Console.WriteLine("\nAverage is: {0}", sum / arr.Length);
break;
}
case 3:
{
do
{
if (numb == 0)
{
Console.WriteLine("A should not be equal to 0!");
}
Console.Write("A= ");
numb = decimal.Parse(Console.ReadLine());
} while (numb == 0);
Console.Write("B= ");
numbB = decimal.Parse(Console.ReadLine());
Console.WriteLine("X= {0}", -numbB / numb);
break;
}
default: Console.WriteLine("Incorect choise!");
break;
}
// );
}
