How to fix OpenGL compile error, "unresolved external symbol" - visual-c++

Question

I'm trying to write an OpenGL program to manipulate the camera. However the code isn't compiling.
All of my source code can be found here.
The error is:
1>------ Rebuild All started: Project: Lab4, Configuration: Debug Win32 ------
1>Build started 2/14/2011 7:17:54 PM.
1>_PrepareForClean:
1> Deleting file "Debug\Lab4.lastbuildstate".
1>InitializeBuildStatus:
1> Touching "Debug\Lab4.unsuccessfulbuild".
1>ClCompile:
1> camera.cpp
1>camera.obj : error LNK2019: unresolved external symbol "public: void __thiscalllVector3::normalize(void)" (?normalize#Vector3##QAEXXZ) referenced in function "public: void __thiscall Camera::set(class Point3,class Point3,class Vector3)" (?set#Camera##QAEXVPoint3##0VVector3###Z)
1>camera.obj : error LNK2019: unresolved external symbol "public: class Vector3 __thiscall Vector3::cross(class Vector3)" (?cross#Vector3##QAE?AV1#V1##Z) referenced in function "public: void __thiscall Camera::set(class Point3,class Point3,class Vector3)" (?set#Camera##QAEXVPoint3##0VVector3###Z)
1>camera.obj : error LNK2019: unresolved external symbol "public: float __thiscall Vector3::dot(class Vector3)" (?dot#Vector3##QAEMV1##Z) referenced in function "private: void __thiscall Camera::setModelviewMatrix(void)" (?setModelviewMatrix#Camera##AAEXXZ)
1>C:\Users\Andrew Davis\Documents\Visual Studio 2010\Projects\Lab4\Debug\Lab4.exe : fatal error LNK1120: 3 unresolved externals
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:01.08
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
I have this in my linker already:
opengl32.lib
glu32.lib
glut32.lib
freeglut.lib
Any suggestions? Thanks in advance!

Answer 1

You have to provide a body for the following functions, even if it's empty.
Vector3::normalize(), Vector3::cross(), Vector3::dot() . For instance
void normalize(){ //do something}
You are calling them, so you get an unresolved linker error because there is no implementation.

Answer 2

This is not a problem with OpenGL or it's libraries. It looks like if camera.cpp uses some different class, but its implementation is either not build or not linked.
EDIT: Just took the look at your code
How about implementing Vector3::normalize(), Vector3::cross() and Vector3::dot()? Lines 86, 107 and 108 in the Pastebin.