Notesale: Turn your study into money

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1
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This can be extended to both sides, making it openended
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Storing Values in Memory
To store a value in memory, we need to know how much space will be
allocated for it
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The number 5 would need to be converted to binary, which
is 32 bits or 4 bytes
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So, if we were storing an integer,
it would take up 2-4 bytes in memory
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For
example, the value stored in a variable could be 5, which would be
represented as 101 in binary
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For example, an array of characters would be of the data type char, and an
array of integers would be of the data type int
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To declare an array in programming, we use a specific syntax
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To declare an array, we would use:
int a[16];

This creates an array called "a" with 16 elements
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For example, we could initialize
an array of integers with the values 1, 2, and 3 like this:
int a[3] = {1, 2, 3};
Representing Arrays in Memory
To represent an array in memory, we need to know how the elements of
the array are stored
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Each element of the array takes up space in memory, depending on its data
type
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Overall, understanding memory and arrays is crucial to programming, as
they are fundamental building blocks of many programs and applications
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All
the elements in an array are stored in consecutive/continuous locations
with the index starting at zero
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One important point to note is that arrays are fixed-size
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Accessing Array Elements
The index of the array starts at zero (although it can start at one in some
cases)
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To access an element, use the formula:
base address + (i * size of data type)
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Dynamic Allocation
The drawback of arrays is that the size needs to be specified at compile
time, which may not always be possible
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If we allocate more space than needed, there will
be unused memory
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To dynamically allocate memory, we use functions such as 'malloc' and
'calloc'
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Error Handling
Unfortunately, there were some errors in the original text, making it
difficult to understand
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If you encounter any errors, please let me know
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In the next video, we will discuss how to
initialize an array at compile time and how to store data in the array at
runtime
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Additionally, we will examine memory management and show how
to use it to test our own code
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In the next video, we will cover how to insert data into arrays,
traverse arrays, and work with 2D arrays
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Arrays can have drawbacks, such as requiring elements of the same data
type and not knowing the index value
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