create instance of class inside namespace : is a better way to implement this code ? 

    int getBlockVector(vector<unsigned char>& vect, const int pos, const int length)
      {
        int destinyInt = 0;
        switch (length) {
          case 1 : destinyInt = (0x00 << 24)              | (0x00 << 16)              | (0x00 << 8)             | vecct.at(pos);  break;
          case 2 : destinyInt = (0x00 << 24)              | (0x00 << 16)              | (vect.at(pos + 1) << 8)  | vect.at(pos);  break;
          case 3 : destinyInt = (0x00 << 24)              | (vect.at(pos + 2) << 16)   | (vect.at(pos + 1) << 8)  | vect.at(pos);  break;
          case 4 : destinyInt = (vect.at(pos + 3) << 24)   | (vect.at(pos + 2) << 16)   | (vect.at(pos + 1) << 8)  | vect.at(pos);  break;
          default : destinyInt = -1;
    return destinyInt;}

considering the ugly default value. 
How implement this function with iterators and template for vector, deque, queue, etc.

Note: the bounds are checked before.
