未定义对'PreconditionViolatedException :: PreconditionViolatedException（std :: string const＆）的引用

Question

我在寻找一个包含四个文件的代码项目中遇到了很多麻烦：

GiftRegistry.cpp：

#include "GiftRegistry.h"
#include "LinkList/LinkedList.h"
#include "LinkList/LinkedList.cpp"
#include <iostream>

template<class ItemType>
GiftRegistry<ItemType>::GiftRegistry() : giftRegistry(new LinkedList<ItemType>())
{
}

template<class ItemType>
bool GiftRegistry<ItemType>::addGift(const ItemType& gift, int desiredRank)
{
    if(giftRegistry->insert(desiredRank, gift))
    {
        return true;
    }
    else{
        return false;
    }
}

template<class ItemType>
void GiftRegistry<ItemType>::moveGift(int curPos, int newPos)
{
    if(giftRegistry->isEmpty())
    {
        ItemType itemToMove = giftRegistry->getEntry(curPos);

        if(giftRegistry->insert(newPos, itemToMove))
        {
            cout << "Gift moved successfully!";
        }
        if(giftRegistry->remove(curPos))
        {
            cout << "Gift removed successfully";
        }
        else{
            cout << "Operation failed. Please examine input.";
        }
    }
}

template<class ItemType>
bool GiftRegistry<ItemType>::removeGift(int position)
{
    if(giftRegistry->isEmpty())
    {
        if(giftRegistry->remove(position))
        {
            return true;
        }

    }
    else
    {
        return false;
    }
}

template<class ItemType>
void GiftRegistry<ItemType>::showRegistry()
{
    for(int i = 1; i < giftRegistry->getLength(); i++)
    {
        ItemType itemToPrint = giftRegistry->getEntry(i);
        std::cout << i + "." + itemToPrint;
    }
}

main.cpp：

#include "GiftRegistry.cpp"
//#include "LinkList/LinkedList.cpp"
#include <iostream>
#include <string>

using namespace std;

int main()
{
    ListInterface<string>* listPtr = new LinkedList<string>();
    //RegistryInterface<string>* weddingRegistry = new GiftRegistry<string>();
    string gift = "hello there";
    listPtr->insert(1, gift);
    cout << listPtr->getEntry(1);
//    string gift = "Box of rocks";
//
//    RegistryInterface<string>* weddingRegistry = new GiftRegistry<string>();
//    if(weddingRegistry->addGift(gift, 1))
//    {
//        cout << "Added item " + gift;
//        weddingRegistry->showRegistry();
//    }
//    else
//    {
//        cout << "Failed to add item. Error.";
//    }
    //weddingRegistry->showRegistry();

    return 0;
}

GiftRegistry.h：

#ifndef Gift_Registry_
#define Gift_Registry_

#include "RegistryInterface.h"
#include "C:\Users\Austin\Documents\LinkList\LinkedList.h"
using namespace std;

template<class ItemType>
class GiftRegistry : public RegistryInterface<ItemType>
{
private:
    LinkedList<ItemType>* giftRegistry;

public:
    string CustomerName;
    string EventName;
    GiftRegistry();

    bool addGift(const ItemType& gift, int desiredRank);
    void moveGift(int curPos, int newPos);
    bool removeGift(int position);
    void showRegistry();

    virtual ~GiftRegistry();
};

#endif // _GiftRegistry_

RegistryInterface.h：

#ifndef REGISTRY_INTERFACE_
#define REGISTRY_INTERFACE_

template<class ItemType>
class RegistryInterface
{
public:
    /** Adds gift to the gift registry
    @post Add was successful
    @param gift The gift to be added to the registry.
    @param giftRank The rank to be attributed to the gift. Also determines the point of insertion for the gift.
    @return 'True' if addition was successful, 'false' if item already exists in the list
    **/
    virtual bool addGift(const ItemType& gift, int giftRank) = 0;

    /** Moves the gift to the user-desired location / priority
    @pre List is not empty
    @param currentPosition The current position of the gift to be moved.
    @param desiredPosition The new position
    **/
    virtual void moveGift(int currentPosition, int desiredPosition) = 0;

    /** Removes the specified item from the List
    @pre List is not empty
    @post Item was removed
    @param position The index of the item to be removed
    @return 'True' if gift was removed, 'False' if not
    **/
    virtual bool removeGift(int position) = 0;


    /** Prints the registry contents and displays them by most wanted to least wanted
    @pre List is not empty
    **/
    virtual void showRegistry() = 0;

    /** Destroys this registry and frees its assigned memory.
    **/
    virtual ~RegistryInterface() { }
};
#endif // REGISTRY_INTERFACE_

我正在使用Code :: Blocks 16.01并遵循C ++ 11标准。 运行“ main.cpp”文件时出现问题，导致出现以下错误：

|| ===构建：在GiftList中调试（编译器：GNU GCC编译器）=== | obj \\ Debug \\ main.o ||在函数ZNK10LinkedListISsE8getEntryEi':| C:\\Users\\Arralan\\Documents\\LinkList\\LinkedList.cpp|121|undefined reference to ZNK10LinkedListISsE8getEntryEi':| C:\\Users\\Arralan\\Documents\\LinkList\\LinkedList.cpp|121|undefined reference to PreconditionViolatedException :: PreconditionViolatedException（std :: string const＆）'|的ZNK10LinkedListISsE8getEntryEi':| C:\\Users\\Arralan\\Documents\\LinkList\\LinkedList.cpp|121|undefined reference to obj \\ Debug \\ main.o ||在函数ZN10LinkedListISsE7replaceEiRKSs':| C:\\Users\\Arralan\\Documents\\LinkList\\LinkedList.cpp|140|undefined reference to ZN10LinkedListISsE7replaceEiRKSs':| C:\\Users\\Arralan\\Documents\\LinkList\\LinkedList.cpp|140|undefined reference to PreconditionViolatedException :: PreconditionViolatedException（std :: string const＆）'|的ZN10LinkedListISsE7replaceEiRKSs':| C:\\Users\\Arralan\\Documents\\LinkList\\LinkedList.cpp|140|undefined reference to ||错误：ld返回1个退出状态| || ===构建失败：3个错误，0个警告（0分钟，0秒）=== |

我对数据结构不熟悉，这个问题使我挂断了两天。 任何帮助或指导将不胜感激，但请记住，这是一项家庭作业。

“ LinkList”中的代码没有错误，并且可以在其单独的项目中按预期运行，但是当被另一个项目引用时，其行为会异常。 我认为问题可能出在我的“ #include”语句上。

编辑：问题是由在此唯一实例中必需的'#include'引起的。 我找到的解决方案，无论是否最佳，都是通过'#include'添加此路径：“ LinkList / PreconditionViolatedException.cpp”。 将此行添加到我的“ main.cpp”后，错误已不再出现。

Answer 1

该问题是由此唯一实例中必需的'#include'引起的。 我找到的解决方案，无论是否最佳，都是通过'#include'添加此路径：“ LinkList / PreconditionViolatedException.cpp”。 将此行添加到我的“ main.cpp”后，错误已不再出现。