C++ string "Undefined symbols" error

[Jomanscool2]

Hello all - always hate to make my first post but after more than an hour of looking I can't figure out what I have done wrong...

I'm writing a simple program to store a tree of strings, and am getting the following error after compiling with g++.

Undefined symbols:
  "Ontology::InsertTerm(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, ItemType*)", referenced from:
      Ontology::InsertTerm(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >)in ccDEky9Q.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

Here is my Ontology.cpp file:

 // Johan Henkens and Kevin Wang for CS24 Lab06 Winter 2010 UCSB

#include "Ontology.h"

Ontology::Ontology(ItemType* type){ 
  head.push_back(type);
}
//Observers
bool Ontology::IsEmptyOnt(){
  return head.size()==0;
}

// "" signifies no parent
bool Ontology::InsertTerm(string parent, string newNode){
  if(parent.compare("")==0){
	ItemType* tempRef = new ItemType();
    tempRef->Initialize(newNode, NULL);
    head.push_back(tempRef);
    return true;
  } 
  for(int i = 0; i < head.size();i++){
    if(head[i]->GetData()==parent){
      for(int o = 0; o<head[i]->getChildrenSize();o++){
	if(head[i]->getChild(o)->GetData().compare(newNode)==0) return true;
      }
      ItemType* temp = new ItemType();
      temp->Initialize(newNode,head[i]);
      head[i]->pushToChildren(temp);
      return true;
    }
  }
  for(int i = 0; i < head.size();i++){
    if(InsertTerm(parent, newNode, head[i])) return true;
    }
    return false;
}
bool InsertTerm(string parent, string newNode, ItemType* root){
  if(root->GetData()==parent){
    for(int i = 0; i<root->getChildrenSize();i++){
      if(root->getChild(i)->GetData().compare(newNode)) return true;
    }
    ItemType* temp = new ItemType();
    temp->Initialize(newNode,root);
    root->pushToChildren(temp);
    return true;
  }
  for(int i = 0; i < root->getChildrenSize();i++){
    if(InsertTerm(parent, newNode, root->getChild(i))) return true;
  }
    return false;
}

Inside an included header in Ontology.h is

#include <iostream>
#include <string>
#include <vector>
using namespace std;

so I doubt it is that I haven't included the right libraries.

I am completely lost as to where I am to go from here. Any advice would be wonderful

[Jomanscool2]

Yuck! Wrong subforum (I think?). My apologies

[Philip Nicoletti]

In your cpp file you have:

bool InsertTerm(string parent, string newNode, ItemType* root){

You just forgot the class name

bool Ontology::InsertTerm(string parent, string newNode, ItemType* root){

[Jomanscool2]

In your cpp file you have:

bool InsertTerm(string parent, string newNode, ItemType* root){

You just forgot the class name

bool Ontology::InsertTerm(string parent, string newNode, ItemType* root){

That was it! Thank you very much.