NewFunc

void addPath(char* path, char* child, char* childpath)
{
  int size_path = length(path);
for (int i = 0; i < size_path; i++) childpath[i] = path[i];
childpath[size_path] = '/';
int length_lastMod = length(child);
int childPathSize = size_path + length_lastMod + 1;
int cnt = 0;
for (int i = size_path + 1; i  < childPathSize; i++)
{
    childpath[i] = child[cnt];
    ++cnt;
    if (cnt == length_lastMod + 1) break;
}
childpath[childPathSize] = '\0';
}