Why is the array going out of bounds?

Question

C++ / C#

Hello. I'm a beginner in C++, so I'm having trouble with its strong typing. I'm trying to use queues. I pass values ​​from the queue to the array, but for some reason an uncaught exception appears, which I usually have when I go beyond the array. I will give a shortened code with a method (the problem area is marked there):

class KittyClass {
public:
  int coord[9][2];
  int x, a, b, w, num;
  std::queue<int> queue;
  KittyClass() {
    x = 0;  
    num = 1;
  }
  bool goKittiesBFS(std::string arr[6][6]) {
    int y = 1, num = 1, g = 0;
    string cats[2];
    string myArrStr;
    string myCompStr;
    string s;
    for (int i = 0; i < 9; i++)
    {
      for (int g = 0; g < 6; g++)
      {
        for (int b = 0; b < 6; b++)
        {
          //strcpy_s(arrStr, arr[w][b].c_str());
          myArrStr = arr[g][b].c_str();
          myCompStr = "k" + std::to_string(num);					
          //strcpy_s(compStrPart, s.c_str());
          //strcat_s(compStr,compStrPart);
          std::cout << myArrStr << " : " << myCompStr << std::endl;
          if (myArrStr == myCompStr)
          {
            queue.push(g);
            queue.push(b);
          }	
                    
        }
      }
      (b >= 6) ? b = 0 : b;
      (g >= 6) ? g = 0 : g;
      num++;			
    }
    
    // ----------------
    // Тут происходит выход за пределы:
    for (int i = 0; i < 9; i++)
    {
      // cats[9][2]  // queue имеет 18 чисел
      cats[i][0] = queue.front();
      queue.pop();
      cats[i][1] = queue.front();
      queue.pop();
    }
    return true;
  }
}

Answer 1

You have within the same class 3 times the variable g is created, 2 times b. For such a naming style, Artemy Lebedev would say "Get out of the profession"

Answer 2

// cats[9][2] // queue has 18 numbers

your cats is an array of two strings, but you index it from 0 to 8:
do you really understand what you write? I don’t see why strict typing would interfere with you here, on js it would also be incomprehensible that

Answer 3

//массив 2 строки
string cats[2];
...
    for (int i = 0; i < 9; i++)
    {
//Перепутан порядок индексов. Первый индекс это номер строки в массиве, второй номер символа в строке. 
//И вы должны быть точно уверены что в строках будет не менее 9 символов.
      cats[i][0] = queue.front(); // <--- должно быть cat[0][i]
      queue.pop();
      cats[i][1] = queue.front(); // <--- должно быть cat[1][i]
      queue.pop();
    }