//Funcion to validate the string
private static void introduceString(Turing machine)
{
Console.WriteLine("Introduce the string to evaluate: ");
string tape = Console.ReadLine();
//In some cases, the Turing Machine needs to check one position after the last character in the string,
//it is necessary to add a space, otherwise it would throw an IndexOutOfBoundException if there is null
tape += ' ';
string pointer = "^";//Head pointer in the machine. Helps to visualize where we are at any moment on the tape
//Create a new file where it will print each step and movement in the machine
Console.WriteLine("Name of the file where the movement will be printed: ");
string file = Console.ReadLine();
//**********IMPORTANT: VERIFY THE LOCATION OF THE FILE AND REPLACE WITH THE FOLDER WHERE IT WILL BE LOCATED************
string fileName = file + ".txt";
using (FileStream fs = File.Create(fileName)) { //Creating a new file using FileStream
Byte[] title = new UTF8Encoding(true).GetBytes("Printing tape\n"); //Printing the head of the new file
fs.Write(title, 0, title.Length);
}
//Recursive function to validate the string
//Parameters: the first state in the Turing Machine, the string to evaluate, the position in the string and the file name to write on it each state.
validateTuringMachine(machine.fetchNode(1), tape, 0, pointer, fileName);
}
//Main function of the Project
static void Main(string[] args)
{
while (true)
{
Console.Clear();
try {//Try-catch block to validate the correct format of entries
Console.WriteLine("What would you like to do in the Turing Machine?\n1.Addition\n2.Subtraction");
short addSub = short.Parse(Console.ReadLine());
if (addSub == 1 || addSub == 2)
{
Turing machine = new Turing(addSub);//Initialization of Turing Machine
while (true)
{
Console.Clear();
try {//Try-catch to validate if the entries are in the valid options
Console.WriteLine("Turing Machine created\n1.Print Turing Machine.\n2.Evaluate a string.");
short op = short.Parse(Console.ReadLine());
if (op == 1)
{
machine.printTuringMachine(); //Printing the Turing Machine
introduceString(machine); //Function call to introduce a string to validate
}
else if (op == 2)
{
introduceString(machine);
}
else
{
throw new Exception(); //Throw exception if the input aren't neither 1 or 2
}
} catch (Exception e) { //Catch if the entry isn't a valid option
Console.WriteLine("Introduce a valid option.\nPress any key to continue.");
Console.ReadKey();
}
}
}
else
{
throw new Exception(); //Throw exception if the input aren't neither 1 or 2
}
} catch (FormatException e) { //Catch if the entry isn't a number
Console.WriteLine("Introduce a valid format.\nPress any key to continue.");
Console.ReadKey();
} catch (Exception e) {//Catch if the entry isn't a valid option
Console.WriteLine("Introduce a valid option.\nPress any key to continue.");
Console.ReadKey();
}
}
}
