ECS50-L9

📗 -> Lecture Date: Name

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Lecture Slide Link

🎤 Vocab

❗ Unit and Larger Context

One big chunk vs Array of Arrays:

One Big Chunk:

• Cons:
  • Need a lot of contiguous space

Array of Arrays:

• Cons:
  • A lot of space is allocated to not storing actual values.
    • The space is reserved for array pointers.
    • A 4x5x6 array uses 17% of space for pointers. (4 arrays pointing to 5 arrays of 6 ints)

Structs:

Structs are like 1D arrays with properties being different sizes

Field	Bytes Past Beginning of struct
x	0
y	4
s	5
name	7
d	17
f	25

Typedef struct Struct_Type{
	Int x;
	Char y;
	Short s;
	Char name[10];
	Double d;
	Float f;
} Example Struct; 

Ordering of Variables

Global Variables

• Stored in order of appearance, so the first global will have the lowest address

Arguments

• Stored in order of appearance, so the first argument will have the lowest address

Locals

• Stored in reverse order of appearance, so the least local will have the lowest address

✒️ -> Scratch Notes

🧪-> Example

• List examples of where entry contents can fit in a larger context

🔗 -> Links

Resources

• Put useful links here

Connections

• Link all related words