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

#define BYTE_LEN    8
#define NUM_BYTES   4
#define BYTE_MASK   0xFF

uint32_t get_nth_byte(uint32_t number, int n);

int main(int argc, char *argv[]) {
    if (argc != 3) {
        printf("Usage: %s number byte_index\n", argv[0]);
    }

    uint32_t number = strtol(argv[1], NULL, 0);
    int byte_index = strtol(argv[2], NULL, 0);
    uint32_t byte = get_nth_byte(number, byte_index);

    printf("Byte %d of %d (0x%08x) is %d (0x%02x)\n", byte_index, number, number, byte, byte);
}

// given a 32 bit number and a byte index n
// return only the nth byte of the number
// you should check that n is a valid byte index,
// i.e. is between 0 and 3
uint32_t get_nth_byte(uint32_t number, int n) {

    return 0;
}