// from https://www.learn-c.org/en/Function_Pointers

#include <stdio.h>
void someFunction(int arg)
{
    printf("This is someFunction being called and arg is: %d\n", arg);
    printf("Whoops leaving the function now!\n");
}

int main(int argc, char * argv[])
{
    void (*pf)(int);
    pf = &someFunction;
    printf("We're about to call someFunction() using a pointer!\n");
    (*pf)(5);
    printf("Wow that was cool. Back to main now!\n\n");
}