What are the key data structures in the C++ Standard Library?

What are the key data structures in the C++ Standard Library?

The C++ Standard Library includes several key data structures such as vectors, lists, deques, sets, and maps. Would you like to know more about any specific one?

Can you explain the differences between a vector and a list?

Sure! A vector is a dynamic array that allows random access and is efficient for accessing elements, while a list is a doubly linked list that allows efficient insertions and deletions but does not support random access.

When should I use a map instead of a vector?

You should use a map when you need to associate keys with values and require fast lookups, insertions, and deletions based on keys. Vectors are better for ordered collections of elements.

What about performance differences between these data structures?

Performance varies: vectors have O(1) access time, lists have O(n) for access but O(1) for insertions/deletions, and maps have O(log n) for lookups. It depends on your use case!