Question

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How to get the value of individual bytes of a variable?

How can I get single bytes from a word (for example an unsigned int in C) without using bit-wise operations (that is using arithmetic operations?)

I don’t know why, but this formula (C-Like) for an x number doesn’t seem to work:

floor(x / pow(R, i)) % R

where R is the radix with which the number is represented, and i is used to indicate the i-th byte to obtain.

Answer 1

If you really need to avoid bitwise operations, you can cheat alternatively (beware if you’re using a little or big endian machine!):

char *int_16_storage;
uint16_t the_word = 0xabcd;
int_16_storage = &the_word;

uint8_t low_byte = int_16_storage[0];
uint8_t high_byte = int_16_storage[1];