I the compiler is giving me the following error on the constructor of graph however it has been defined in the public section. Error

/tmp/ccku0faq.o: In function `Graph::Graph()':
Main.cpp:(.text._ZN5GraphC1Ev[Graph::Graph()]+0x39): undefined reference to `AdjacencyMatrix::AdjacencyMatrix()'
collect2: ld returned 1 exit status

Here is my code

class Graph {

private:
	vector<Node*> nodeList;//list of verticies
	bool foundCycle;//true if a cycle is found, false otherwise
	int desiredCycSize;
	AdjacencyMatrix adjMatrix;

	void clearVisited() {

		for(int i = 0; i < nodeList.size() && !foundCycle ; i++) {
			nodeList[i]->setStatus(NOT_VISITED);
		}
	}

	void addNewNode(Node *nNode) {
		nodeList.push_back(nNode);
	}

	Node* findNodeByName(int name) {
		for(int i = 0 ; i < nodeList.size() ; i++) {
			if(nodeList[i]->getName() == name)
				return nodeList[i];
		}

		return NULL;
	}

	Node* findNodeByIndex(int index) {
		return nodeList[index];
	}

public:
	Graph() {
		foundCycle = false;
	}

	~Graph() {
		//free mem allocated to verticies
		for(int i=0 ; i < nodeList.size() ; i++)
			delete nodeList[i];
		nodeList.clear();
	}

	void displayGraph() {
		for(int i=0 ; i < nodeList.size() ; i++) {
			nodeList[i]->displayList();
		}
	}
	
	void printMatrix() {
		adjMatrix.print();
	}

	bool readData(string fileName) {
		ifstream istream;
		istream.open(fileName.c_str());

		if(istream.is_open())				//check to make sure the file opened

			return false;					//file didnt open properly

		int graphSize;
		istream >> graphSize;		
		adjMatrix.changeSize(graphSize);		//set size of Adjacency Matrix

		for(int i = 0; i < graphSize; i++) {			//populate the nodeList vector with all the nodes
			Node* newNode = new Node(i);
			addNewNode(newNode);
		}

		//graph is garunteed to have a perfect square number of vertices
		//DOORS LISTED IN ORDER: NORTH, EAST, SOUTH, WEST, FOR EACH ROOM

		for(int i = 0; i < graphSize; i++) {
			if(istream.get() == '1') {		//check North

				findNodeByIndex(i)->addAdjNode(findNodeByIndex((int)(i - sqrt((double)graphSize))));
				adjMatrix.addAdjToMatrix(i, (int)(i - sqrt((double)graphSize)));
			}	

			if(istream.get() == '1') {		//Check East

				findNodeByIndex(i)->addAdjNode(findNodeByIndex(i++));
				adjMatrix.addAdjToMatrix(i, i++);
			}	

			if(istream.get() == '1') {		//Check South

				findNodeByIndex(i)->addAdjNode(findNodeByIndex((int)(i + sqrt((double)graphSize))));
				adjMatrix.addAdjToMatrix(i, (int)(i + sqrt((double)graphSize)));
			}	

			if(istream.get() == '1') {		//Check West

				findNodeByIndex(i)->addAdjNode(findNodeByIndex(i--));
				adjMatrix.addAdjToMatrix(i, i--);
			}	

		}

		return true;		//program executed successfuly

	}
};


int main() {

	Graph maze;
	
	cout << "Please enter an input file name: ";
	string fileName;
	cin >> fileName;
	
	maze.readData(fileName);
	
	maze.printMatrix();	

	

	return 0;

}

Thanks

Have you ever seen the compiler message? It's AdjacencyMatrix constructor was not defined!

Comments
Good quick answer thanks so much

o wow ok ya im stupid I had declared it but not defined it and i was being dislexic reading the error message. Thanks so much

This question has already been answered. Start a new discussion instead.