In programming, a map is a data structure that stores key-value pairs. Maps are useful for storing and retrieving data quickly and efficiently. In C++, the standard library provides a map class template that is implemented as a binary search tree. In this article, we will explore the map class in C++ with examples.
What is a Map?
A map is a data structure that stores key-value pairs. The key is used to retrieve the corresponding value. Maps are useful for storing data that needs to be looked up quickly. They are commonly used in applications such as dictionaries, phone books, and databases.
How to Declare a Map?
To declare a map in C++, we use the map class template provided by the standard library. The map class is defined in the header file