What is the purpose of std::vector in c++?
In C++, std::vector is a container class in the STL (Standard Template Library) used to store a group of elements. It provides the functionality of dynamic arrays, allowing the number of elements in the container to be increased or decreased at any time, and supports random access to elements. Similar to arrays, std::vector’s advantage is that it can dynamically adjust its size without the need for manual memory management.
The role of std::vector includes but is not limited to:
- Store a set of elements and support operations such as adding, removing, accessing, and iterating through the elements.
- Provide the functionality of dynamic arrays, allowing the container size to be adjusted as needed.
- Providing some member functions and operator overloading makes it easier to manipulate containers.
- It is possible to access and manipulate elements using iterators.
- Similar to other container classes in the STL, it can be easily combined with other STL algorithms and containers.
In general, std::vector is one of the commonly used data structures in C++, providing convenient dynamic array storage functionality for use in programs.
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