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  7. Structuur van Computerprogramma\'s II

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Samenvatting Hoofdstuk 3a: Pointers
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  • Course
  • Structuur van Computerprogramma\'s II
  • Institution
  • Vrije Universiteit Brussel (VUB)
  • Book
  • The C Programming Language

Dit is de samenvatting van het derde hoofdstuk van het vak Structuur van Computerprogramma's II. In deze samenvatting werd zowel alle relevante informatie uit de slides als informatie uit eigen notities opgenomen.

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Document information

  • No
  • Chapter 5
  • July 28, 2022
  • 10
  • 2020/2021
  • Summary

Subjects

  • pointers
  • pointer variables
  • dereferencing
  • adressing variables
  • pointer arithmetic
  • pointers as arguments
  • pointers and arrays
  • array names vs pointers
  • null pointer
  • strings
  • string constants
  • copying string
  • c

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  • Computerwetenschappen
  • Structuur van Computerprogramma's II
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Content preview

Hoofdstuk 3a: Pointers
1 Variables (recap from Chapter 1)
• a variable refers to an object that holds a value
o an object is a memory area with an address
• a lvalue is an expression referring to an object
o identifies a place where a result can be stored
• a rvalue designates a value

2 Addresses vs Contents
Wat we vinden
op een bepaald
adres =/= adres
zelf




3 Pointer
• = Variable that holds the address of another variable as its value.
100




1

, 3.1 Content of a Pointer Variable




3.2 Indirection or Dereferencing Operator




3.3 Addressing Variables
• What doesn’t have an address?
o register variables
o constants/literals/preprocessor
defines
o expressions (unless result in a
variable or array element)
• & operator only applies to objects in
memory : variables and array elements




2

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