c.md

i should add to this

Bit arithmethic (which I should have remembered but /shrug whatever)

A mini catalogue of every bit manipulation trick I'll ever need

(recap: one byte = 8 bits = 2 nibbles)

32 bits = one word of memory for 32-bit systems

0000 0000 0000 0000 0000 0000 0000 0000
^ MSB                                 ^ LSB

• Bitwise operations
  • >> is arithmethic left shift. The result of a >> b is everything in a shifted left by b places -- equivalent to multiplying by 2^n (assuming no overflow). So 1 >> 2 = 0000 0001 >> 2 = 0000 0100 (4)
• Operators in C, C++
• How to set, unset, toggle, etc a bit

Misc

• Format specifiers when printing strings

Random thing I found useful (I always forget this)

const int NUM = 5;
int arr[NUM];

doesn't compile for reasons.