C++中使用 ofstream ifstream 写入读取文件

  ofstream out("2.txt", std::ifstream::out);
  if (!out)
    int x = 11;
  out.close();
  ifstream in("2.txt", std::ifstream::in|std::ios::binary);
  if (!in)
    int x = 11;
  in.seekg(0, std::ios::end);
  int iFileLen = in.tellg();
  char* pFileBuf = new char[iFileLen];
  in.read(pFileBuf, iFileLen);
  std::string strBuf = pFileBuf;
  delete[] pFileBuf;
  in.close();