cplusplus:pointers_1_slides
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| cplusplus:pointers_1_slides [2021/10/19 19:13] – [Pointer hardware model] mithat | cplusplus:pointers_1_slides [2021/10/19 19:29] (current) – [Example] mithat | ||
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| Line 6: | Line 6: | ||
| Deitel, Harvey M., and Paul J. Deitel. " | Deitel, Harvey M., and Paul J. Deitel. " | ||
| Mithat Konar\\ | Mithat Konar\\ | ||
| - | March 28, 2019 | + | October 19, 2021 |
| ===== Introduction ===== | ===== Introduction ===== | ||
| Line 34: | Line 34: | ||
| ===== Pointer hardware model ===== | ===== Pointer hardware model ===== | ||
| - | A //pointer// variable set to point to '' | + | |
| + | * A //pointer// variable set to point to '' | ||
| ^ Variable name ^ Memory location ^ Memory contents across all 8 bytes (64 bits) ^ | ^ Variable name ^ Memory location ^ Memory contents across all 8 bytes (64 bits) ^ | ||
| - | |'' | + | |'' |
| |::: | |::: | ||
| |::: | |::: | ||
| |::: | |::: | ||
| - | The //value// of the pointer variable is the base address of another variable. | + | * The //value// of a pointer variable is the base address of another variable. |
| ===== Pointer visual model ===== | ===== Pointer visual model ===== | ||
| Line 60: | Line 61: | ||
| ===== Pointer syntax basics ===== | ===== Pointer syntax basics ===== | ||
| - | ===== Declaration | + | ===== Pointer declaration |
| * '' | * '' | ||
| * Type of data being pointed to must also be indicated. | * Type of data being pointed to must also be indicated. | ||
| Line 77: | Line 78: | ||
| </ | </ | ||
| - | ===== Declaration | + | ===== Pointer declaration |
| * You can declare more than one pointer variable at a time: | * You can declare more than one pointer variable at a time: | ||
| Line 99: | Line 100: | ||
| * Most environments show base addresses as [[http:// | * Most environments show base addresses as [[http:// | ||
| - | ===== Assignment | + | ===== Pointer assignment |
| * Declare an integer variable '' | * Declare an integer variable '' | ||
| Line 110: | Line 111: | ||
| {{: | {{: | ||
| - | ===== Assignment | + | ===== Pointer assignment |
| * Declare an integer variable '' | * Declare an integer variable '' | ||
| Line 129: | Line 130: | ||
| - | ===== Assignment | + | ===== Pointer assignment |
| - | * Chaning | + | * Changing |
| <code cpp> | <code cpp> | ||
| Line 142: | Line 143: | ||
| </ | </ | ||
| - | ===== Initialization | + | ===== Pinter initialization |
| * Local pointer variables in C++ are not automatically initialized. | * Local pointer variables in C++ are not automatically initialized. | ||
| * Uninitialized pointers point to arbitrary memory. //Very dangerous.// | * Uninitialized pointers point to arbitrary memory. //Very dangerous.// | ||
| Line 164: | Line 165: | ||
| * '' | * '' | ||
| - | ===== Pointer operators | + | ===== Operators for pointers |
| - | * **address operator** ''&'' | + | * **address operator** ''&'' |
| - | * **indirection** or **dereferencing operator** '' | + | * **indirection** or **dereferencing operator** '' |
| ===== Indirection/ | ===== Indirection/ | ||
| Line 220: | Line 221: | ||
| << | << | ||
| << | << | ||
| - | |||
| cout << endl; | cout << endl; | ||
| Line 231: | Line 231: | ||
| << | << | ||
| << | << | ||
| + | |||
| return 0; | return 0; | ||
| } | } | ||
| </ | </ | ||
cplusplus/pointers_1_slides.1634670788.txt.gz · Last modified: 2021/10/19 19:13 by mithat