Thread: Multiple definition errors for seemingly no reason at all

I don't know what to think, here. Basically, what I have are three constants stored in a header file, that my compiler (Dev C ver. 4.9.9.2) is telling me have multiple definitions. I have done everything that I know to do (such as using ifndef/endif) to try and get these errors to go away, but it doesn't work.

Here is some of the relevant code:

Code:

#ifndef _CONSTANTS_H
#define _CONSTANTS_H

const int MAX_ID_SIZE = 16;
const int FILE_BUFFER_SIZE = 80;
const int SYMBOL_TABLE_SIZE = 32;

#endif

Code:

#ifndef _INITIALIZATION_H
#define _INITIALIZATION_H
#include "ScannerParams.h"
#include "Constants.h"

void InitializeSymbolTable(symbol * symbolTable);

#endif

Code:

//Initialization.c
#include "Initialization.h"

void InitializeSymbolTable(symbol * symbolTable){
   int x;
   for(x = 0; x < SYMBOL_TABLE_SIZE; x++){
      symbolTable[x].info = NULL;
      symbolTable[x].token_Code = -1;      
   }
}

Code:

//main.c
#include "Initialization.h"

int HashKey(char * key){
   int keyIndex = 0;
   int x;
   for(x = 0; x < MAX_ID_SIZE; x++){
....

^This code in main.c is the only place where MAX_ID_SIZE is currently being used right now; for whatever reason, C has decided that by using this constant, I am therefore "redefining" it. I don't know how or why.

Do you guys have any ideas on what I'm doing wrong?