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C++: Difference between revisions
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* <code>-std=c++17</code> for C++17 support | * <code>-std=c++17</code> for C++17 support | ||
* <code>-O3</code> for level 3 optmizations | * <code>-O3</code> for level 3 optmizations | ||
===Arrays=== | |||
In C++, you can use <code>std::vector</code> which gives you a resizable array. | |||
This will allocate an array in the heap.<br> | |||
[https://shendrick.net/Coding%20Tips/2015/03/15/cpparrayvsvector.html array vs vector] | |||
If you need a static sized array, you can use <code>std::array</code>.<br> | |||
This wrapper around C-style arrays gives us size information and allows the array to be passed around while keeping the array on the stack unlike <code>std::vector</code> | |||
If you want to allocate a static array on the heap, you can do so as follows: | |||
<syntaxhighlight lang="C++"> | |||
auto my_arr = std::make_shared<std::array<char,64>>(); | |||
</syntaxhighlight> | |||
===Strings=== | ===Strings=== | ||
====String Interpolation==== | ====String Interpolation==== | ||
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====Smart Pointers==== | ====Smart Pointers==== | ||
[https://www.geeksforgeeks.org/auto_ptr-unique_ptr-shared_ptr-weak_ptr-2/ Smart Pointers]<br> | [https://www.geeksforgeeks.org/auto_ptr-unique_ptr-shared_ptr-weak_ptr-2/ Smart Pointers]<br> | ||
There are 4 types of smart pointers | Smart pointers were added in C++11.<br> | ||
There are 4 types of smart pointers: | |||
* <code>auto_ptr</code> which is [https://stackoverflow.com/questions/3697686/why-is-auto-ptr-being-deprecated deprecated] | * <code>auto_ptr</code> which is [https://stackoverflow.com/questions/3697686/why-is-auto-ptr-being-deprecated deprecated] | ||
* <code>unique_ptr</code> | * <code>unique_ptr</code> | ||
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====Garbage Collection==== | ====Garbage Collection==== | ||
Starting from C++ | Starting from C++11, you should use smart pointers such as [https://en.cppreference.com/w/cpp/memory/shared_ptr <code>shared_ptr</code>] which have automatic garbage collection.<br> | ||
<br> | <br> | ||
Traditional C++ does not have garbage collection.<br> | Traditional C++ does not have garbage collection.<br> | ||