数据结构类模板

• 其实就是个数据结构的基础作业，其中的从文件直接读入功能总是会有bug，后来查到是没有初始化cur指针，让其指向了NULL，所以造成后续的文件内容读入造成困难（此处特别感谢江荣哥的帮助@Aurora）
  下面就贴一下代码吧：
  存在错误的代码：

  template<class T>
  void List<T>::getInfo() {
  	ifstream ifs("database.txt",ios::in);
  	char ch;
  	if (!ifs) { cerr << "读取数据失败！" << endl; exit(1); }
  	ifs.get(ch);
  	if (ifs.eof()) cout << "该文件尚未输入数据！" << endl;
  	else {
  		LinkNode<T>* cur = first->link ;
  		first->link = cur;
  		while (!ifs.eof()) {
  			ifs.unget();
  			char temp;
  			ifs >> cur->data.stuId >> cur->data.stuName >> cur->data.stuBirthday >> cur->data.stuGender >> cur->data.stuBody>>temp;
  			cout << "学号：" << cur->data.stuId << ' ' << "姓名：" << cur->data.stuName << ' ' << "生日：" << cur->data.stuBirthday << ' ' <<"性别：" << cur->data.stuGender << ' ' << "健康状况：" << cur->data.stuBody<<endl;
  			LinkNode<T>* theNext = new LinkNode<T>;
  			cur->link = theNext;
  			cur = theNext;
  		}
  		cout << "读取成功" << endl;
  	}
  }

  template<class T>
  void List<T>::getInfo() {
  	ifstream ifs("database.txt",ios::in);
  	char ch;
  	if (!ifs) { cerr << "读取数据失败！" << endl; exit(1); }
  	ifs.get(ch);
  	if (ifs.eof()) cout << "该文件尚未输入数据！" << endl;
  	else {
  		LinkNode<T>* cur = new LinkNode<T>;
  		first->link = cur;
  		while (!ifs.eof()) {
  			ifs.unget();
  			char temp;
  			ifs >> cur->data.stuId >> cur->data.stuName >> cur->data.stuBirthday >> cur->data.stuGender >> cur->data.stuBody>>temp;
  			cout << "学号：" << cur->data.stuId << ' ' << "姓名：" << cur->data.stuName << ' ' << "生日：" << cur->data.stuBirthday << ' ' <<"性别：" << cur->data.stuGender << ' ' << "健康状况：" << cur->data.stuBody<<endl;
  			LinkNode<T>* theNext = new LinkNode<T>;
  			cur->link = theNext;
  			cur = theNext;
  		}
  		cout << "读取成功" << endl;
  	}
  }

• 另外我感觉上面的关于文件读入的内容可以考虑江荣的那种while方法，即

  while(cur->data.stuId >>cur->data.stuName >> cur->data.stuBirthday >> cur->data.stuGender >> cur->data.stuBody>>temp)