未定義的參考`圖:: InsertVertex(的std :: string)」
如果我編譯我的項目!任何暗示爲什麼他不能解決這個參考? (所有文件都在NetBeans項目文件夾)
// 的main.cpp
#include <cstdlib>
#include <string>
#include "Graph.h"
using namespace std;
int main(int argc, char** argv)
{
Graph<string> *graph = new Graph<string>(); // <--- ERROR
graph->InsertVertex("A");
return 0;
}
// Node.h
#include <iostream>
#include "Graph.h"
template<class T>
class Node
{
friend class Graph;
public:
Node(T val)
{
this->data = val;
this->vertList = NULL;
this->next = NULL;
}
Node(const Node& orig);
virtual ~Node();
private:
T data;
Node<T> *vertList;
Node<T> *next;
int status;
};
// Graph.h
#include <iostream>
#include "Node.h"
template <class T>
class Graph
{
public:
Graph()
{
head = NULL;
}
void InsertVertex(T val);
void InsertEdge(T v_val, T e_val);
void PrintVertices();
void PrintEdges(T v_val);
void DeleteEdge(T v_val, T e_val);
void DeleteVertex(T val);
void bfs();
private:
Node<T> *head;
};
// Graph.cpp
#include "Graph.h"
template <class T>
void Graph<T>::InsertVertex(T val)
{
Node<T> *temp = new Node<T>(val);
if(head == NULL) head = temp;
else
{
Node<T> node = head;
while(node->vertList != NULL)
node = node->vertList;
node->vertList = temp;
}
}
template <class T>
void Graph<T>::InsertEdge(T v_val, T e_val)
{
if (head != NULL)
{
Node<T> *k = head;
Node<T> *t = head;
Node<T> *temp = new Node<T> (e_val);
while (t != NULL)
{
if (t->data == v_val)
{
Node<T> *s = t;
while (s->next != NULL)
s = s->next;
s->next = temp;
while (k != NULL)
{
if(k->data == e_val) break;
k = k->vertList;
}
temp->vertList = k;
return;
}
t = t->vertList;
} // end while loop
}
else std::cout << "Add first vertices to the graph" << std::endl;
}
template <class T>
void Graph<T>::PrintEdges(T v_val)
{
Node<T>* t = head;
while (t != NULL)
{
if (t->data == v_val)
{
while (t->next != NULL)
{
std::cout << t->next->vertList->data << " ";
t = t->next;
}
}
t = t->vertList;
}
}
template <class T>
void Graph<T>::PrintVertices()
{
Node<T>* t = head;
while (t != NULL)
{
std::cout << t->data << " ";
t = t->vertList;
}
}
不能將類模板的成員函數定義放在'.cpp'文件中。 – 2013-02-16 19:19:07
本週至少有五次這樣問。你應該認真改善你的搜索結果。 :p – 2013-02-16 19:20:51
搜索自己的問題標題[「C++未定義的模板類方法參考」](https://www.google.com/search?q=C%2B%2B+undefined+reference+to+template+class+方法)爲stackoverflow解釋的gobs。 – 2013-02-16 19:27:35