Memory Stuff

• Each bit of memory is an array of bytes
  • Each byte is 8 bits
• An integer is 4 bytes. That should give some context!
• The i takes up 4 bytes and pointers take up 8 bytes. Pointers point to the first address in the bigger “array” that a whole variable occupies

Automatic sizeof when adding

Doing this:

int a[2]
int* p = a + 2

The “2” is actually 2 * sizeof(int) which C does automatically cuz it knows the array type

Memory regions:

• Text
  • Stores “code” (function pointers point here!)
• Global
  • Stores global variables
• Stack
  • Stores function calls + local variables + return addresses
• Heap
  • Where manual (de)allocation is done. For data that will task outside of functions