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Introduction
A vector is a dynamic array that is built into a standard C++ library. This vector class can grow in size dynamically. The elements are arranged in a continuous manner so that iterators can traverse them.
In this article, we will see an introduction to vector array, c++ vector erases function, clear function, syntax, example, and implementation in C++.
C++ Vectors
Vectors are used in C++ to store elements of related data types. We can adjust the size of the vector during the execution of a program to solve our problems. The C++ Standard Template Library includes vectors. We must include the vector header file in our program to use vectors.
To include the vector library in your program, use the below command:
#include<vector>
C++ vector erase function
The vector erase() function is implemented in the vector class and is used to remove elements one at a time.
The vector erase() function is used to remove the elements from a specified position.
Vector erase() function is of two types:
🔺vector.erase(position) -It specifies the element's position that needs to be removed from the vector.
🔺vector.erase(start position, end position) -It specifies the range of the element which needs to be removed from the vector.
Use clear() when you want to remove all elements from the vector and make it empty.
This function does not take any parameters.
It is typically used when you no longer need the contents of the vector and want to free up memory.
erase():
Use erase() when you want to remove specific elements from the vector based on their position or a range.
This function can remove a single element at a specified position or a range of elements specified by iterators.
It is used when you need to selectively remove elements from the vector while retaining others.
Frequently Asked Questions
Are vectors better than arrays in C++?
Vectors are better suited for frequent insertion and deletion, whereas arrays are significantly better suited for frequent element access. Arrays are a memory-efficient data structure, whereas Vectors take more memory in exchange for managing storage.
What does STL mean in C++?
C++ STL (standard template library) is a C++ standard library containing templates representing containers, iterators, algorithms, and function objects.
Does vector erase reduce the size of the array?
Yes, vector erase reduces the size when you erase the elements. Vector returns the number of elements present in the vector.
Conclusion
In the above article, we have extensively discussed the introduction to vector array, c++ vector erases function, clear function, syntax, example, and implementation in c++.
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