CS118 Spring 2018 Shared Notes

This is a pastebin for general note-taking.

~~~~~~~~~~2-22-2018~~~~~~~~~~
We got yelled at for not doing well enough on the quiz up to 1.4.1
	->CPU doesn't know if a number is stored in hex,m binary, or decimal. All numbers are stored as decimal
	->Most people got the question for how a word is stored. IA32 doesn't require a word to start on byte 0 or 4. bytes 1-4 CAN form a word.
	->Signed-magnetude stores a negative number as 1 in bit n-1 followed by a base 2 representation of magnitude.
	-> the following code WILL BE ON FINAL:
		int f()
		{	int x=1;
			char *p;
			p = (char *) &x;
			return *p;
		}
		returns 1 if machine is big endian and 0 if little endian, and returns the value of x.
	-> the range of numbers that can bbe stored using an n-bit word is [0,2^n-1] NOTE: it is not [0,2^(n-1)]