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  1. #include <iostream>
  2. #include <windows.h>
  3. #include <iterator>
  4. #include <fstream>
  5. #include <string>
  6. using namespace std;
  7.  
  8. const int N = 100; // Line amount
  9. const int n = 5; // Rule amount
  10.  
  11. int rule = 0, length = 0;
  12.  
  13. void reader(int &head, string &tape, string a[N][n]);
  14.  
  15. int main()
  16. {
  17.     int head, position;
  18.     string tape;
  19.     string p, d = "0";
  20.     string a[N][n] = { "" };
  21.     reader(head, tape, a);
  22.     position = head - 1;	// variable position
  23.     p = tape[position];	// variable in the line
  24.     while (d != "X")
  25.     {
  26.         for (int y = 0; y < length; y++)
  27.             if ((d == a[y][0]) && (p == a[y][1]))
  28.             {
  29.                 tape[position] = a[y][2][0];
  30.                 if (a[y][3] == "L") // if string equals L (or R) it switches/moves
  31.                     position--;
  32.                 else
  33.                     position++;
  34.                 p = tape[position];
  35.                 d = a[y][4];
  36.                 y = length;
  37.             }
  38.         for (int j = 0; j < rule; j++)
  39.         {
  40.             cout << tape[j];
  41.             //Sleep(1);
  42.         }
  43.         cout << endl;
  44.     }
  45.     system("PAUSE");
  46.     return 0;
  47. }
  48. void reader(int &head, string &tape, string a[N][n])
  49. {
  50.     string filename;
  51.     cout << "which file do you want to open?" << endl;
  52.     cin >> filename;
  53.  
  54.     ifstream df(filename.c_str());
  55.     df >> head;
  56.     //cout << head << endl;
  57.     df >> tape;
  58.     rule = tape.size(); // how many symbols we have in our line
  59.     //cout << tape << endl;
  60.     for (int i = 0; i < N; i++)
  61.         if (df >> a[i][0])
  62.         {
  63.             //cout << a[i][0] << ' ';
  64.             for (int j = 1; j < n; j++)
  65.             {
  66.                 df >> a[i][j];
  67.                 //cout << a[i][j] << ' ';
  68.             }
  69.             //cout << endl;
  70.         }
  71.         else
  72.         {
  73.             length = i; //how many lines of rules we have
  74.             i = N;
  75.         }
  76.     //cout << rule << endl;
  77.     //cout << length << endl;
  78.     //cout << tape[23] << endl;
  79.     df.close();
  80. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp:2:21: fatal error: windows.h: No such file or directory
 #include <windows.h>
                     ^
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/yoNVNI
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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