传递istream intro函数 [英] Passing istream intro a function

问题描述

我制作一个类似于pokemon的游戏类型程序。我们有一个锦标赛类，跟踪几个团队（自己的类），它包括宠物（自己的类）与不同种类的宠物是CPet的子类。

I am making a game-type program similar to the idea of pokemon. We have a tournament class that keeps track of several teams(its own class) which consists of pets(its own class) with different kinds of pets being subclasses of CPet.

我们试图将一个文件名传入main，从文件名的主路径进入Tournament类。在比赛类中，我们打开文件：

We are attempting to pass a file name into main, from main pass that file name into the Tournament class. In the Tournament class we open the file with:

 14 //Construct a tournament
 15 CTournament::CTournament(const char *Filename){
 16         //opening file
 17         ifstream inFile(Filename, ios::in);
 18         if(inFile.bad()){
 19                 cout << "File error" << endl;
 20                 return ;
 21         }
 22          //get Teamlist for tournament
 23          while(!(inFile.eof())){
 24                  CTeam* temp = new CTeam;
 25                  temp->ParseTeam(inFile);
 26 
 27                  TeamList.push_back(temp);
 28          }
 29 }

这里我们将文件传入CTeam.ParseTeam看起来像：

Here we pass inFile into CTeam.ParseTeam which looks like:

     30 void CTeam::ParseTeam(std::istream in){
     31   string readline;
     32   getline(in, readline);
     33   this->TeamName = readline;
     34   while(!(in.eof())&&(readline != " " || readline != "/n"))
     35   {
     36           getline(in, readline);
     37           this->Parse(readline);
     38   }
     39 }

，我们得到错误： p>

and we are getting the error:

In file included from /usr/include/c++/4.4/ios:39,
                 from /usr/include/c++/4.4/ostream:40,
                 from /usr/include/c++/4.4/iostream:40,
                 from CTournament.h:11,
                 from CTournament.cpp:8:
/usr/include/c++/4.4/bits/ios_base.h: In copy constructor 'std::basic_ios<char, std::char_traits<char> >::basic_ios(const std::basic_ios<char, std::char_traits<char> >&)':
/usr/include/c++/4.4/bits/ios_base.h:790: error: 'std::ios_base::ios_base(const std::ios_base&)' is private
/usr/include/c++/4.4/iosfwd:47: error: within this context
/usr/include/c++/4.4/iosfwd: In copy constructor 'std::basic_istream<char, std::char_traits<char> >::basic_istream(const std::basic_istream<char, std::char_traits<char> >&)':
/usr/include/c++/4.4/iosfwd:53: note: synthesized method 'std::basic_ios<char, std::char_traits<char> >::basic_ios(const std::basic_ios<char, std::char_traits<char> >&)' first required here 
CTournament.cpp: In constructor 'CTournament::CTournament(const char*)':
CTournament.cpp:25: note: synthesized method 'std::basic_istream<char, std::char_traits<char> >::basic_istream(const std::basic_istream<char, std::char_traits<char> >&)' first required here 
CTournament.cpp:25: error:   initializing argument 1 of 'void CTeam::ParseTeam(std::istream)'

我知道有一个类似的问题，不包括fstream。我们已经将它包含在两个头文件中。

I know there is a similar question about this where he did not include fstream. We have included it in both header files.

我想也许这是一个问题，没有传递正确的类型到PraseTeam，但我找不到任何非常具体的

I thought maybe it was a problem of not passing the correct type into PraseTeam, but I could not find anything very specific on how else to pass the file into ParseTeam to verify whether I was doing it correctly or not.

提前感谢。

推荐答案

您需要通过引用传递流，因为流一般不可复制：

You need to pass the stream by reference, because streams are not generally copyable:

void CTeam::ParseTeam(std::istream &in)

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