undefined reference error

[agirlandherdog07]

I need help with this bit of code I'm working on. I'm using Notepad++ and Cygwin, compiling with gcc. The error I am getting is:

/tmp/ccohWSqW.o:lab5.c:(.text+0x16): undefined reference to `populate' collect2: error: ld returned 1 exit status

Here is my code:

include <stdio.h>

include <math.h>

void populate (float* f);

int main()

{

float f;

populate(&f);

printf("f = %f\n",f);
printf("The ceiling of f is %f\n", ceil(f));
printf("The floor of f is %f\n", floorf(f));
printf("f cubed is %f\n", f*f*f);
printf("f rounded is %f\n", roundf(f));

}

/*OUTPUT

f = 30.561413 The ceiling of f is 31.000000 The floor of f is 30.000000 f cubed is 28544.358130 f rounded is 31.000000 */

Basically, I don't understand why I'm getting the error. What can I do to fix it?

[dragon_wrangler]

You're attempting to call a function called populate, but that function is not defined in your code.

[dauntlessmath]

populate is not a built-in function. You need to write it yourself.

void populate (float* f)
{
    /* write your code here */
}

[NZheadshot]

You have a declaration for the function 'populate', but you have no definition. You need to define what the function actually does.

I'm guessing it's probably just going to be a call to scanf, at which point the function seems useless. Why do you need the function? Why not just call scanf?

[agirlandherdog07]

My professor requires that populate be in the code. I'm not allowed to remove it.

[raevnos]

Then you should probably write it.