Arrays

Question 1

Define arrays

Answer 1

A method of grouping together mulitple values of the same type into a larger group (e.g. int)

Question 2

Why use arrays?

Answer 2

Arrays are a group of values which can be selected by index.
-Stored in a contiguous part of the memory
-all values are the same type

Question 3

What is a common problem with arrays?

Answer 3

When iterating past the end of the array, the memory is accessed wich can produce unpredictable results

Question 4

How do we define a 2D array

Answer 4

int values[n][m]

Question 5

How can memory be assigned dynamically

Answer 5

malloc - allocates memory and leaves it unitialised
calloc - sets to zero
realloc - new memory size for existing array

Question 6

using arrays how do we find the maximum value

Answer 6

The maximum is assigned as the first value. (index 0)
The other elements are checked starting from index 1 `

Question 7

Using arrays, how can an element be added in the middle?

Answer 7

Provided the array is declared large enough, values to the right of the new value are shifted

Question 8

How do we pass an array through a function?

Answer 8

function(array , array size)