这是免费char *的正确点吗

I have this code

我有这个代码

{
 char *filename = createFilename(file, extension);
 ...
 ...
 delete[] filename;
}

inline char *DataSet::createFilename(LPCSTR file, LPCSTR extension)
{
  char *path = new char[strlen(file) + strlen(extension) + 1];
  strcpy(path, file);
  strcat(path, extension);

  return path;
}
{
 char *filename =