Box Packing ASCII art illustration

gistfile1.cpp

int n = this->x.size() + 1; // + 1 is used if the 1x1 box is excluded
int s = this->s.val();
std::vector<std::vector<char> > buffer(s, std::vector<char>(s, ' '));

for (int i = 0; i < n - 1; i++) {
  int size = this->size(n, i); // Size of box i
  int x = this->x[i].val();
  int y = this->y[i].val();
  if (size > 1) {
      for (int xl = x; xl < x + size; xl++) {
          buffer[y]       [xl] = '_';
          buffer[y+size-1][xl] = '^';
      }
      for (int yl = y; yl < y + size; yl++) {
          buffer[yl][x]        = '|';
          buffer[yl][x+size-1] = '|';
      }
      buffer[y]       [x]        = '\\';
      buffer[y]       [x+size-1] = '/';
      buffer[y+size-1][x]        = '/';
      buffer[y+size-1][x+size-1] = '\\';
      if (size > 2) {
          std::stringstream ss; ss << size;
          std::string s = ss.str();
          for (int i = 0; i < s.size(); i++)
              buffer[y+size/2][x+(size-s.size())/2+i] = s[i];
      }
  } else buffer[y][x] = '#';
}

for (int line = s-1; line >= 0; line--) {
  for (int chr = 0; chr < s; chr++)
      os << buffer[line][chr];
  os << std::endl;
}