Two test cases for functions in https://lobste.rs/s/e7vp0t/arithmetical_way_check_for_number

arithmetical_way_testcases.c

#include<limits.h>
#include<stdlib.h>
#include<stdio.h>

int f1(int num)
{
    const int result = abs(num) - num;
    return result;
}

int f2(int num)
{
    const int result = num - abs(num);
    return result;
}

int main()
{
    const int test_value = INT_MIN;
    const int result1 = f1(test_value);
    const int result2 = f2(test_value);
    printf("f1:%d\n", result1);
    printf("f2:%d\n", result2);
    return 0;
}