cplusplus:pointers_4
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cplusplus:pointers_4 [2016/03/21 23:52] – [Smart Pointers] mithat | cplusplus:pointers_4 [2019/03/31 22:35] (current) – mithat | ||
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===== Dynamic memory allocation ===== | ===== Dynamic memory allocation ===== | ||
- | **Dynamic memory allocation** allows you to reserve blocks of computer memory | + | **Dynamic memory allocation** allows you to reserve blocks of computer memory at //runtime// and use them to store variable data. The declared blocks or memory |
==== The '' | ==== The '' | ||
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</ | </ | ||
- | '' | + | '' |
<file cpp simple-allocation.cpp> | <file cpp simple-allocation.cpp> | ||
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**Deallocation** is the process of releasing back to the OS storage that was previously dynamically allocated. | **Deallocation** is the process of releasing back to the OS storage that was previously dynamically allocated. | ||
- | //Any memory that has been dynamically allocated must be deallocated | + | Deallocation of dynamically allocated |
- | Since deallocation of dynamically allocated | + | <WRAP center round tip 90%> |
+ | Any memory that you have dynamically allocated | ||
+ | </ | ||
The code below fixes the memory leak introduced above: | The code below fixes the memory leak introduced above: | ||
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for (count = 0; count < numDays; count++) | for (count = 0; count < numDays; count++) | ||
{ | { | ||
- | cout << "Day " << (count + 1) << ": "; | + | |
- | cin >> sales[count]; | + | cin >> sales[count]; |
} | } | ||
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for (count = 0; count < numDays; count++) | for (count = 0; count < numDays; count++) | ||
{ | { | ||
- | total += sales[count]; | + | |
} | } | ||
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==== heap vs. stack ==== | ==== heap vs. stack ==== | ||
- | Up to now, we may have given the impression that local variables and dynamically allocated storage | + | Local variables and dynamically allocated storage |
A more detailed discussion of the heap versus the stack, while important, is beyond the scope of the present discussion. But it is important to know that there are two different memory pools that C++ programs draw from. | A more detailed discussion of the heap versus the stack, while important, is beyond the scope of the present discussion. But it is important to know that there are two different memory pools that C++ programs draw from. | ||
+ | |||
==== '' | ==== '' | ||
'' | '' | ||
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===== Smart Pointers ===== | ===== Smart Pointers ===== | ||
- | <WRAP center round todo 60%> | ||
- | TODO | ||
- | </ | ||
- | |||
C++11' | C++11' | ||
One smart pointer is the '' | One smart pointer is the '' | ||
- | + | '' | |
- | '' | + | |
<file c++ Gaddis-Pr9-17.cpp> | <file c++ Gaddis-Pr9-17.cpp> |
cplusplus/pointers_4.1458604343.txt.gz · Last modified: 2016/03/21 23:52 by mithat