C :: How To Do Arithmetic On Structure Members Read From A Text File

I am trying to use arithmetic on structure members read from separate text files into separate functions. I'm trying to do the math in the main function after calling the other two functions. I'm trying to divide nato_attack by pact_defence.

The warning I'm getting is: both are being used uninitialized in this function.

The goal is to read/write the info in the text files and to use them as any other variable, i.e. add, subtract, etc. in other locations in my code, i.e. functions, modules.

I "borrowed" most of this code from a youtube lesson and modified it for my needs.

Below is the contents of the two text files and my code.

This is for NATO
6
12 4th_mech_div mech div 14 16 7
12 5th_mech_div mech div 10 8 7
12 3rd_mech_div mech div 5 6 6
12 1st_mech_div mech div 4 6 7
12 2nd_mech_div mech div 12 14 7
12 6th_mech_div mech div 8 12 6

This is for Pact
3
10 1st_Guards armor div 12 8 6
10 2nd_Guards armor div 12 9 6
10 3rd_Guards mechanized div 10 9 6

Code:
#include <stdio.h>
#include <stdlib.h>
typedef struct {
char *unit_id;
char *unit_type;
char *unit_size;

[Code] ....