C++实现删除txt文件中指定内容的代码实例

fstream in("C:\\Users\\Administrator\\Desktop\\test.txt", ios::in);//原文件
  fstream out("C:\\Users\\Administrator\\Desktop\\temp.txt", ios::out);//中间文件
  string name, pass, str, estr;
  cout << "输入1:" << endl;
  cin >> name;
  cout << "输入2:" << endl;
  cin >> pass;
  str = name.append(" ").append(pass);//test.txt中需要删除的某一行内容，可根据自己的需要修改
  while (getline(in, estr))//得到test.txt中一行的内容
  {
    if (!estr.compare(str))//比较test.txt每一行的内容和要删除的是否一致，一致就跳过(不懂为啥跳过看文章开头的方法)
      continue;
    out << estr << "\n";//不一致的内容写到temp.txt中，注意换行
  }
  in.close();//关闭流
  out.close();
  fstream outfile("C:\\Users\\Administrator\\Desktop\\test.txt", ios::out);
  fstream infile("C:\\Users\\Administrator\\Desktop\\temp.txt", ios::in);
  while (getline(infile, estr)) //将temp.txt的内容写到test.txt
  {
    outfile<< estr << "\n";
  }
  const char* path = "C:\\Users\\Administrator\\Desktop\\temp.txt";
  remove(path);//删除temp.txt
  outfile.close();//关闭流
  infile.close()