Backward String

So. I just don't know. I can't get it to even run. Every time I try tweaking this program, I just get more issues. Here are my error codes as is:

1>Backward_String_N.obj : error LNK2001: unresolved external symbol "void __cdecl makeBackward(char *)" (?makeBackward@@YAXPAD@Z)
1>c:\users\owner\documents\visual studio 2010\Projects\Backward_String_N\Debug\Backward_String_N.exe : fatal error LNK1120: 1 unresolved externals

And here is my program:

// Backward_String_N.cpp : Defines the entry point for the console application.

// This program belongs to NM.
#include "stdafx.h"
#include <iostream>
using namespace std;

// Function prototype.
void makeBackward (char *);

int main()
{
	const int size = 51;
	char word[size];
	char *wo;
	wo = &word[size];

	// Get string.
	cout << "Enter a word, name, or phrase: ";
	cin.getline(word, size);

	// Function call.
	makeBackward(wo);

	return 0;
}

// Function header.
void makeBakward(char *wo)
{
	int c;
	
	cout << "Here is what you entered, but backward: ";
	for (c = 0; c >= 0; c--)
	{
		cout << wo[c];
	}
}

Any help is very much appreciated.