C++ :: Binary Tree Template - Getting Errors / Unresolved External Symbol

Feb 10, 2013

When I compile the program, I get errors I've never seen before. Here's my program:

Header File
#ifndef BINARYTREE_H
#define BINARYTREE_H
#include <iostream>
using namespace std;

[Code] ....

And my errors
1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall BinaryTree<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >::insertNode(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)"

[Code] ....

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C++ :: Unresolved External Symbol Errors

Apr 10, 2013

I'm doing a homework assignment where I have to calculate monthly interest from a starting balance. I've pulled several sections of the code from various parts of the book. So my problem may be that I'm not combining them correctly.

I'm getting the following error:
Error1error LNK2019: unresolved external symbol "public: __thiscall SavingsAccount::SavingsAccount(void)" (??0SavingsAccount@@QAE@XZ) referenced in function _main

The ios flags are new to me and that may be part of the problem. As soon as I can get a working program, I'm going to make the starting balance and interest rate user inputs. But I get seem to get past this error.

// Savings.cpp
// Chapter 10_Problem 10.7
#include <iostream>

[Code].....

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C/C++ :: VS Errors - Unresolved External Symbol

Jan 14, 2015

This is a file called namespaces.h

#pragma once
namespace mycode {
void foo();
}

This is a file called source.cpp

#include <iostream>
#include "namespaces.h"
namespace mycode {
void foo() {
std::cout << "foo() called in the mycode namespace" << std::endl;
}
}

When I try to run this code i keep getting these errors;

Error1error LNK2019: unresolved external symbol "void __cdecl mycode::foo(void)" (?foo@mycode@@YAXXZ) referenced in function _mainC:UsersHomeDesktopgameDevWin32Project1Win32Project1Source1.objWin32Project1

Error2error LNK1120: 1 unresolved externalsC:UsersHomeDesktopgameDevWin32Project1DebugWin32Project1.exeWin32Project1

this is a win32 console application, like the books says, the book i am working from that is.

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C++ :: Errors With Unresolved Token And Unresolved External Signal

Jul 10, 2013

My program will not run because of error LNK2028 "unresolved token" and error LNK2019 "unresolved external signal" and I do not know why. My teacher says that I need to make the constructor and display functions display class variables in different formats, but I do not know what to do with that. Here are my 3 files:

Header take 2.h:

#pragma once
#include <iostream>
#include <string>
using namespace std;
class Heading {
private:
string company, report;

[Code] ....

Here are the errors:
Error1error LNK2028: unresolved token (0A0003C9) "public: __thiscall Heading::Heading(void)" (??0Heading@@$$FQAE@XZ) referenced in function "int __cdecl main(void)" (?main@@$$HYAHXZ)c:UsersOwnerdocumentsvisual studio 2012ProjectsClassLibrary2ClassLibrary2Source1.objClassLibrary2

[Code] ....

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C++ :: Unresolved External Symbol - Basic Keylogger Using SDL

Feb 25, 2014

My code is rather short, but when I compile it, I get 1 error about an unresolved external symbol, it probably has something to do with the file processing. . .

Just a basic keylogger using SDL

Keylogger.h
#ifndef KEYLOGGER_H
#define KEYLOGGER_H
#include <fstream>
#include <SDL.h>
using namespace std;
class Keylogger{

[Code] .....

Errors

Error1error LNK2019: unresolved external symbol __imp___CrtDbgReportW referenced in function "public: char const & __thiscall std::_String_const_iterator<class std::_String_val<struct std::_Simple_types<char> > >::operator*(void)const " (??D?$_String_const_iterator@V?$_String_val@U?$_Simple_types@D@std@@@std@@@std@@QBEABDXZ)C:Usersaviedocumentsvisual studio 2013ProjectsPracticePracticeKeylogger.objPractice

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C++ :: Error LNK2019 - Unresolved External Symbol

Feb 27, 2013

I am currently working on an Account login system and when I run the program I receive this error message:

error LNK2019: unresolved external symbol

If you want to see the full code of the source file just ask

const int NUM_OF_ACCOUNTS = 1;
Account *account = new Account[NUM_OF_ACCOUNTS];
int AccountSearch(int number, string password);
foundAccount = AccountSearch(aNumSearch, passSearch);
int AccountSearch(int n, string p); {
int x = 0;

[code]....

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C/C++ :: Unresolved External Symbol In MySQL Connector

Jul 1, 2014

So even though I have so many issues with linking libraries, I apparently became the go-to person for a fellow college friend of mine for a sql library. He's using the mysql connector/c++ and his team has had quite a few issues getting it set up. I've solved two out of three issues:

1st issue I solved was that they didn't know how to build boost, I just linked it and they were good to go.

2nd issue I solved was that they were missing libmysql.lib, I just installed the mysql server onto their computer and linked that up. 3rd issue is where I am now stumped at, as they get a compile error: LNK2001 unresolved external symbol: _get_driver_instance().

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C/C++ :: Error LNK2019 - Unresolved External Symbol

Apr 4, 2014

// polynomial header file
#ifndef POLY_H
#define POLY_H
#include<iostream>
using namespace std;
class Polynomial {
friend ostream &operator<<( ostream &out, const Polynomial &rhside);
friend istream &operator>>( istream &in, Polynomial &rhside);

[code]....

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C++ :: Compiling Program - Unresolved External Symbol Error

Jan 17, 2013

When I try to compile a program from a C book I am following I am getting these errors, I have looked for ways to resolve it but I wasn't able to.

Errors:

Error3error LNK2001: unresolved external symbol _druk_instructiesC:UsersIvoDocumentsVisual Studio 2012ProjectsConsoleApplication2ConsoleApplication2Handspel.objConsoleApplication2
Error4error LNK2001: unresolved external symbol _speler_keuzeC:UsersIvoDocumentsVisual Studio 2012ProjectsConsoleApplication2ConsoleApplication2Handspel.objConsoleApplication2
Error5error LNK2001: unresolved external symbol _machine_keuzeC:UsersIvoDocumentsVisual Studio

[Code] .....

The .h file:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string>

#ifdef __cplusplus
extern "C"

[Code] .....

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Visual C++ :: Unresolved External Symbol When Building For X64 Platform

Jul 11, 2014

The project builds on Win32 platform, but not on x64.

Full error message: dllentry.obj : error LNK2001: unresolved external symbol "class CFactoryTemplate * g_Templates" (?g_Templates@@3PAVCFactoryTemplate@@A)

The dllentry.cpp (a DirectShow base class) compiles on both platforms. It contains the external declarations:

extern CFactoryTemplate g_Templates[];
extern int g_cTemplates;
g_Templates[] is then used in two functions:
__control_entrypoint(DllExport) STDAPI DllGetClassObject(__in REFCLSID rClsID,
__in REFIID riid, __deref_out void **pv)

[Code]...

myClass.cpp contains the definitions for the two externals in dllentry.cpp, at top level, just after the includes:

CFactoryTemplate* g_Templates=0;
int g_cTemplates=0;

myClass.cpp also compiles by itself, but the project does not build. I checked all the libraries in the project settings and all seems to be OK, the 64 bit versions are used.

What should I do to make the project build for x64 platform?

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Visual C++ :: Error LNK2001 - Unresolved External Symbol

Jul 31, 2013

I am getting this error while compiling my c++ project in Visual Studio2005,

Error3error LNK2001: unresolved external symbol "class OdRxModule * __cdecl odrxCreateModuleObject_For_OdRasterProcessingServicesImpl(class OdString const &)" (?odrxCreateModuleObject_For_OdRasterProcessingServicesImpl@
@YAPAVOdRxModule@@ABVOdString@@@Z)DwgDirect.obj
Error4error LNK2001: unresolved external symbol "class OdRxModule * __cdecl

[code]....

eventhough i linked all the .lib files under the path

1 . Project->Properties->Configuration Properties->Linker->Input->Additional Dependencies->
2. Toolos->options->VC++ Directories

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C/C++ :: Templated Data Structure - Error LNK2019 / Unresolved External Symbol

Mar 23, 2015

I am working on building a set of templated data structures for my own learning and have run in to an error when instantiating my templated linked list. I receive the following error:

error LNK2019: unresolved external symbol "public: __thiscall LinkedList<int>::~LinkedList<int>(void)" (??1?$LinkedList@H@@QAE@XZ) referenced in function _main

--LinkedList.h--
#ifndef LINKEDLIST_H
#define LINKEDLIST_H
template<class T>
class LinkedList {

[code]....

why I would be receiving this error?

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Visual C++ :: Enable Writing To And Reading From Files - Unresolved External Symbol

May 13, 2013

Perhaps this can be a very popular error,

Code:

#include <stdio.h>
#include <tchar.h>
#include <iostream>
#include <string>
#include <fstream>// enable writing to and reading from files
#include <cstdlib>
#include <time.h>
using namespace std;
class Person {

[Code] .....

Error list:

Code:

Error 1 error LNK2019: unresolved external symbol "void __cdecl saveperson(void)" (?saveperson@@YAXXZ) referenced in function _main H:Cry_DevProgrammingC++Using_class_ in_ c++Using_class_ in_ c++Using_class_ in_ c++.obj
Error 2 error LNK2019: unresolved external symbol "void __cdecl displayperson(void)" (?displayperson@@YAXXZ) referenced in function _main H:Cry_DevProgrammingC++Using_class_ in_ c++Using_class_ in_ c++Using_class_ in_ c++.obj
Error 3 error LNK2019: unresolved external symbol "void __cdecl editperson(void)" (?editperson@@YAXXZ) referenced in function _main H:Cry_DevProgrammingC++Using_class_ in_ c++Using_class_ in_ c++Using_class_ in_ c++.obj
Error 4 error LNK1120: 3 unresolved externals H:Cry_DevProgrammingC++Using_class_ in_ c++DebugUsing_class_ in_ c++.exe 1

What I can do to fit this problem?

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C++ :: Creating Public And Static Field In A Class - Unresolved External Symbol Error

Apr 5, 2014

I'm trying to create a public and static field in a class called ResourceManager. But when trying to access the field even from inside the class it wont work. I'm getting this error message:

Error 1 error LNK2001: unresolved external symbol "public: static int ResourceManager::num" (?num@ResourceManager@@2HA)

Here's my code:
ResourceManager.h

Code:

class ResourceManager {
public:
static int num;
static void loadContent();

[Code] .....

I'm using Visual Studio 2012.

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C++ :: Template Class Type - Unresolved Link Errors

Jun 25, 2013

I'm getting unresolved link errors when I attempt to compile.

dNode.h

#ifndef DNODE_H
#define DNODE_H
template <class T>
class dNode {

[Code] ....

ERROR:
Error1error LNK2019: unresolved external symbol "public: __thiscall dStack<double>::dStack<double>(void)" (??0?$dStack@N@@QAE@XZ) referenced in function "void __cdecl stack_test(void)" (?stack_test@@YAXXZ)main.objprog09
Error2error LNK2019: unresolved external symbol "public: virtual __thiscall dStack<double>::~dStack<double>(void)" .......

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C++ :: Create Binary Search Tree Template To Be Used To Create AVL Tree

Feb 10, 2013

For my data-structures class, I am attempting to create a binary search tree template to be used to create an AVL tree. I've written a Generic_Tree template for the BST to inherit from, and before I jump into implementing the AVL tree I'm testing the BST member functions. Everything was compiling fine until I added the BST insert() function. Now, I'm getting the following error message from my linker:

undefined reference to 'BST<void>::insert(int, void*)'

Stemming from the call in main line 16.

my makefile compiles with:
g++ -Wall -g Generic_Tree.cpp BST.cpp barfing.cpp main.cpp

Generic_Tree:

template < typename NODE_DATA, unsigned MAX_KIDS >
class Tree {
protected:
struct NODE {
NODE_DATA* contents;
Tree* child[MAX_KIDS];
Tree* parent;

[Code] ....

I'm use to c and havn't used classes or templates before (except for declaring instances of them). The whole syntax is mystifying to me,.

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C++ :: Fatal Error - One Unresolved External

Apr 30, 2014

I'm trying to implement this queue class, and I don't know why it won't compile. I wrote a main function in the main.cpp file and even commented out the calls to functions add and removed and still gave me the fatal error.

queue.h

#ifndef QUEUE_H
#define QUEUE_H
namespace queuesavitch {
struct QueueNode {
char data;

[Code] .....

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C++ :: Tile Map (unknown Reason For Unresolved External Symbols)

Nov 7, 2013

So I tried to make a tile map function to display my map as tiles. I keep getting unresolved external symbol errors, I've included the header file, and used every declaration in it, but to be completely honest this is mostly just a try to see if I could do it, and so far I'm failing. So if you can see why I'm getting the error.

header tileMap.h:

#include<SFML/Graphics.hpp>
#include<iostream>
#include<fstream>
#include<string>
#include<cctype>
#include<vector>

class tileMap{

[Code] .....

output message:
1234567891011121314
1
1> main.cpp
1>c:users wiggystardustdocumentsvisual studio 2010projects ilemapenginemain.cpp(21): warning C4018: '<' : signed/unsigned mismatch

[Code] ....

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C++ :: Use External Template With Template Specialization?

Nov 17, 2013

[URL]

#include <iostream>
struct Outer {
template<typename T>
void go() {
std::cout << Test<T>::f() << std::endl;

[Code] .....

I have tried several variants on this code to no avail. Outer is in a header, along with the extern template statements, and the specializations after main are in their own cpp file. Main is in a different cpp file.

What do have to do to make this work? I cannot bring the definitions of f() into the header, and they will be different for different template parameters. Ideally, I want Test to remain a private member of Outer, though this can change if it's the only option.

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C :: External Errors / Unable To Exit Via Switch Case

Oct 12, 2013

The basics of the program is that:It will ask the user whether they want to: Pop, Push , Peek or Exit the program.

When it comes to the Exit case: how do so( tried exit(1) & exit(0) using the internet hasn't brought me much luck either. I am getting these two errors also:

"Error LNK2019 : Unresolved external symbol "int_cdcel peek(void)" (?peek@@YAHXZ)"

Each applying to the functions below.

"Error LNK1120: 3 Unresolved Externals"

I'm not sure their is much more I can say about the problem.

Code:

#include "stdafx.h"#include <stdio.h>
/* Libary Collection.*/
#define MAX 10
/* Define: The max size of what we are working with.*/
int push (void);
int pop(void);
int peek (void);

[code]...

I was also told that I could us if statements instead but, that still will remove the first errors

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C++ :: Unresolved Externals For Template Class

Dec 21, 2012

Code:
// declaration
template<class T>
class GetValue {
void Initialize(std::string fileName);
};

[Code] ....

I understood that GetValue<D3DXVECTOR3>::Initialize was not defined.

How can I reuse the GetValue::Initialize method in every derived classes from GetValue, such as GetD3DXVECTOR3, GetD3DXMATRIX, GetOpenGLVector3 etc ...

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C/C++ :: Find Maximum Element From A Tree (not A Binary Tree)

Oct 31, 2014

I want to find maximum element from a tree (not a binary tree ) ???? ...using c language...

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C++ :: Finding Errors In Class Template

Nov 17, 2014

I have to find at least 5 errors in the following class template. I have found three and it now compiles, here is the template

#include <map>
#include <utility>
template <class T> class foo{
public :
foo(T bar1, T bar2){
_bar1.push_back(bar1);
_bar2.insert( std::pair<T,T>(bar1,bar2) );

[Code] ....

The errors I believe I have found are as follows: the vector library has not been added, the map requires two type arguments rather than one and the object which is created in main doesn't pass any values to the constructor. I fixed all of these errors and the code now compiles without errors, however the problem asks for five.

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C++ :: Compiling Errors In Template Class?

Mar 22, 2014

what my compiling errors mean, and what I should do to fix them: The following is my header & Implementation files. Note, the purpose of this class is a built in Array.

Header File:

#ifndef ARRAY_H
#define ARRAY_H
#include <iostream>

[Code].....

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C/C++ :: Finding Errors In Class Template?

Nov 18, 2014

I have to find at least 5 errors in the following class template. I have found three and it now compiles, here is the template

#include <map>
#include <utility>
template <class T> class foo{
public :

[Code]....

The errors I believe I have found are as follows: the vector library has not been added, the map requires two type arguments rather than one and the object which is created in main doesn't pass any values to the constructor. I fixed all of these errors and the code now compiles without errors, however the problem asks for five.

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C++ :: Template Errors - No Matching Function For Call To Load

Oct 22, 2013

My load function isnt working. I've tested it and returned it as an int and it worked but when i tried to compile when i changed it to a template i started getting the errors and I'm not sure how to fix it:

all_sort.cpp:41:15: error: no matching function for call to 'load'
int *value = load("./integers.txt", size);
^~~~
./bubble_sort.h:44:4: note: candidate template ignored: couldn't infer template
argument 'T'
T *load(const char* x, int &size) {

[Code] ....

I'm trying to use my load function to load integers from a file into and array and then return it back.

#include "bubble_sort.h"
#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;
int main(){
int n, pick = 1, size = 0;

[Code] ....

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