From: "Lonnie Lee" <airtime AT kih DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: help with C
Date: Wed, 8 Mar 2000 13:47:30 -0600
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

  I am tring to learn "c" and in doing so I have bought a book called "Sams
Teach Yourself C in 21 Days".  I guess is a good but but most examples do
not work! Got to debug them. This is a good learning tool , I guess, but
does not explain how. Below is a code that does not work:

/* Program to Calculate the product of two numbers. */
#include <stdio.h>

int a,b,c;

int product(int x, int y) ;

int main()
{
/*Get the first number*/
printf("Enter a number between 1 and 100: ");
scanf("%d",&a);

/*Get the seconde number*/
printf("Enter another number between 1 and 100: ");
scanf("%d",&b);

/* Calculate and display the product */
c = product(a, b);
printf("%d times %d = %d\n" ,a ,b ,c);

return 0;

}
/* Function returns the product of the two values provide */
int pruduct(int x, int y)
{
return (x * y);
}


OK you can "compile" no problem but when you go to build it you get an
error.
"undefined reference to 'product'"
If anyone could help I would appreciate it. If there is a site or newsgroup
where I need to go that would be great. Because I am tring to learn it would
be great if I have a resource for informatiom.

Thanks all Lonnie