C++ 读写文件流

1. 读文件流 

string readpro(const char* path) {

  ifstream infile(path);

  char buf[1024];

  string message = "";

// 假如 infile 后面没有路径,要先打开文件 infile.open(path);

  if (infile.is_open()) {

    while (infile.good() && !infile.eof()) {

      memset(buf, 0, 1024);

      infile.getline(buf, 1024);

      message += buf;

    }

    infile.close();

  } else

    cout << "error!" << endl;

  return message;

}

2. 写文件流:

ofstream outfile("/data/name.out", ios::trunc);

outfile.write((char*)result.string(), result.length());

outfile.close();