从ifstream多次读取(Reading from ifstream multiple times)

 抱歉，如果这是一个非常简单的问题，但我对C ++很新，而且我正在处理我正在研究的项目。 
 
 该项目的一部分涉及将对象的信息写入.txt文件，并能够读取该.txt文件以加载到对象中。 （在这种情况下，信息是写入而不是对象本身，以便有人可以轻松编辑.txt来更改对象）。 
 
 我正在调用从.txt文件中读取的函数如下： 
 
void Room::load(ifstream& inFile)
{
string garbage;
string str;
inFile >> garbage >> garbage >> mId;
inFile >> garbage; getline(inFile, mName);
inFile >> garbage; getline(inFile, mDesc);
loadVec(garbage, inFile, mExits);
}
 
 “垃圾”用于摆脱.txt中的描述符以帮助用户。 
 
 典型的房间对象应如下所示： 
 
Room ID: 2
Name: Foyer
Description: The player can enter here from the kitchen.
Exits: 3 4 
 
 我尝试加载多个房间时出现问题。 第一个房间将完美加载，但任何后续房间将无法正确加载。 
 
 我至少会期望它以这样的方式失败，因为.txt文件中的第一个房间被重复加载但事实并非如此。 
 
 我非常感谢任何人可以提供的任何帮助，谢谢你提前。 
 
 编辑：现在我正在使用以下代码加载房间： 
 
if (inFile)
    {
    //Assign data to objects
    room0.load(inFile);
    room1.load(inFile);
    }
 
 在这种情况下，room0将使用.txt文件中第一个房间的数据结束，但room1保持不变，但出于某种原因清除其出口除外。 
 
 此刻测试程序给出以下内容： 
 
BEFORE LOAD

ID= -1
NAME= Nowhere
DESC= There's nothing here.
Exits= -1

ID= -1
NAME= Nowhere
DESC= There's nothing here.
Exits= -1

AFTER LOAD

ID= 1
NAME=  Kitchen
DESC=  This is the first room the player will see.
Exits= 2 3 5 6

ID= -1
NAME= Nowhere
DESC= There's nothing here.
Exits=

Press any key to continue . . .
 
 这些房间分别在加载前后分别为room0和room1。 
 
 这是loadVec函数的样子： 
 
//Loads consecutive integers from inFile, saving them to vec
void loadVec(string& garbage, ifstream& inFile, vector<int>& vec)
{
int num;
vec.clear();

inFile >> garbage >> num;
vec.push_back(num);

while (inFile)
{
    inFile >> num;
    vec.push_back(num);
}

vec.erase(vec.begin() + vec.size() - 1);
}
 
 以及应该加载程序的未编辑的.txt文件： 
 
Room ID: 1
Name: Kitchen
Description: This is the first room the player will see.
Exits: 2 3 5 6

Room ID: 2
Name: Foyer
Description: The player can enter here from the kitchen, they can exit to the rooms     with the IDs listed as 'Exits'.
Exits: 3 4 

Room ID: 3
Name: Bathroom
Description: This is the third room.
Exits: 4 

Apologies if this is a really simple question but I'm fairly new to C++ and I'm having trouble with a project I'm working on.
 
Part of this project involves writing the information of an object to a .txt file and being able to read that .txt file to load in an object. (In this case the information is written rather than the object itself so that someone can easily edit the .txt to change an object).
 
The function I'm calling to read from the .txt file is as follows:
 
void Room::load(ifstream& inFile)
{
string garbage;
string str;
inFile >> garbage >> garbage >> mId;
inFile >> garbage; getline(inFile, mName);
inFile >> garbage; getline(inFile, mDesc);
loadVec(garbage, inFile, mExits);
}
 
"garbage" being used to get rid of descriptors in the .txt to help a user.
 
A typical room object should look something like the following:
 
Room ID: 2
Name: Foyer
Description: The player can enter here from the kitchen.
Exits: 3 4 
 
My problem occurs when I try to load multiple Rooms. The first Room will load perfectly but any subsequent Room will fail to load properly.
 
I would have at least expected it to fail in such a way as the first room in the .txt file is loaded repeatedly but that isn't the case.
 
I'd be very grateful for any help anyone could offer, thanks in advance.
 
Edit: For now I'm loading rooms using the following code:
 
if (inFile)
    {
    //Assign data to objects
    room0.load(inFile);
    room1.load(inFile);
    }
 
In this case, room0 winds up with the data of the first room in the .txt file but room1 remains unchanged with the exception of having its exits cleared for some reason.
 
Testing the program at the moment gives the following:
 
BEFORE LOAD

ID= -1
NAME= Nowhere
DESC= There's nothing here.
Exits= -1

ID= -1
NAME= Nowhere
DESC= There's nothing here.
Exits= -1

AFTER LOAD

ID= 1
NAME=  Kitchen
DESC=  This is the first room the player will see.
Exits= 2 3 5 6

ID= -1
NAME= Nowhere
DESC= There's nothing here.
Exits=

Press any key to continue . . .
 
Those rooms being room0 and room1 respectively both before and after load.
 
Here's what the loadVec function looks like:
 
//Loads consecutive integers from inFile, saving them to vec
void loadVec(string& garbage, ifstream& inFile, vector<int>& vec)
{
int num;
vec.clear();

inFile >> garbage >> num;
vec.push_back(num);

while (inFile)
{
    inFile >> num;
    vec.push_back(num);
}

vec.erase(vec.begin() + vec.size() - 1);
}
 
And the unedited .txt file from which the program should be loading:
 
Room ID: 1
Name: Kitchen
Description: This is the first room the player will see.
Exits: 2 3 5 6

Room ID: 2
Name: Foyer
Description: The player can enter here from the kitchen, they can exit to the rooms     with the IDs listed as 'Exits'.
Exits: 3 4 

Room ID: 3
Name: Bathroom
Description: This is the third room.
Exits: 4 

原文：https://stackoverflow.com/questions/20237164