Subj : beginners linking problem
To   : borland.public.cpp.borlandcpp
From : "cory" <cdhauck@math.umd.ede>
Date : Fri Sep 05 2003 02:03 pm

I am writing code to do mathematics only - nothing special.  Here is a cartoon version of what I want to do.  I'm going to add two numbers!!!!


My main program "main.c" looks like this:

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <conio.h>
#include "tf.h"

int main() {

double a;
double b;
double c;

a=.2;
b=.4;
c = tf(a,b);
printf("c = %f\n",c);

getch();
return 0;
}



The function tf.c looks like this:


double tf(double a, double b)
{
   double r;
	r = a + b;
   return r;
}


The header file "tf.c" just contains the function declaration.  If I include the function in my main file, it works fine.  However, as is, I get the error

Error:  Unresolved external _tf referenced from module main.c


This has got to be really simple, but damn if I can find an answer.

.