Help with Turing Machine Sim?

[PsychoCoder]

Hello, This is my second semester taking c++ and one of our final projects is to make a Turing Machine Simulator in C++ but I need help with some things which really shouldn't be holding me up so much!

First let me give you an example of what the input file looks like:

10 if 1 goto 15
right
goto 10

15 halt


The alphabet of the turing machine tape is{1,0,b} and the control unit has a RWH and a ROH. RWH points to tape, ROH points to the Turing Program.
The way I am going about doing this by first prompting the user to input through command then storing the input into a doubly linked list pointer struct.

From there I want to make an array of structs with the label (10, 15 or whatever int they put in) and a pointer that points to the corresponding textfile line.
For example:
label 10 -> if 1 goto 15


This is where I run into trouble. I have another struct with instructions. Its members are opCode, string alphabet, ptr branch, ptr next.

My main question is, How can I take that input, and store then in their corresponding structs. I know there is an easier way of doing this that I am missing and any help would be appreciated. Heres what Ive got so far.

//////////////////////////Specification////////////////////

class Turing 
  { 
    public:  void turingMachineSim (char);
             Turing (); //default
    
    private: struct tape;  // tape
             typedef tape* ptr; 
             struct tape 
               { 
                 string name;
                 ptr left;
                 ptr right; 
               };
               
            struct Label; 
             typedef label* ptr; 
             struct Label 
               { 
                 int labelName;
                 ptr instruction; 
               }label [20];
               
            struct iCode; //instructions
            typedef iCode* ptr;
            struct iCode
                {
                    char opCode;
                    string alpha;
                    ptr branch;
                    ptr nextOp;
                }
               
          
  }; 

#include "Turing.h"
void Turing::turingMachineSim (char fileName)
{
    ptr RHW, ROH, temp1, temp2;
    int k = 0;
    char input;
    string line;
    fin.open (fileName);
    
    RWH = new (tape);
    RWH -> name = b;
    RWH -> left = NULL;
    RWH -> right = NULL;
    temp2 = RWH; 
    
    do
        {
          system ("cls");
          SkipLine (9, 'c');
          cout << setw (54) << "Please enter input for turing program: ";
          SkipLine (2, 'c');
          cout << setw (58) << "Input a '~' when you are done: ";
          cin >> input;
          temp1 = new (tape);
          temp1 -> name = input          
          temp1 -> left = temp2;
          temp1 -> right = NULL;
          temp2 -> right = temp1;
          temp2 = temp1;
        }
    while (input != '~'); 
    //detach last node
    temp2 -> left -> right = NULL;
    temp2 -> left = NULL;
    delete temp1;
    delete temp2;    
    RWH = RWH -> right; // makes RWH the point to leftmost nonblank
    
    // No idea what I'm doing here. Just tossing ideas
    while (getline(fin,line,' ')  // while not end of file
        {
            if (
            fin >>label[k].labelName;
            label [k].instruction = new (iCode);
            fin >> label [k].instruction -> opCode;   
            fin >> label [k].instruction -> alpha;
            fin >> label [k].instruction -> branch;
            
            
            
    
   
}