#include <stdio.h>
#include <string.h>

void print_integers(int int_value, int* int_pointer)
{
    printf("Got an integer value %d and an address to an integer with value %p\n", int_value, (void*)int_pointer);
}

void change_integers(int int_value, int* int_pointer)
{
    int_value = 23;
    *int_pointer = int_value;
}

int main(int argc, char* argv[])
{
    int int_value;
    int* int_pointer;

    int_value = 42;
    int_pointer = &int_value;
    //to point to a variable, we need to use here the '&' symbol before a variable, to get it's address.

    print_integers(int_value, int_pointer);

    change_integers(int_value, int_pointer);
    print_integers(int_value, int_pointer);
    //only, the value in the int_value changed, because we change it. But the address can't be changed, because we only change it's value.

    return 0;
}