What are the main containers in C++ Standard Library?

What are the main containers in C++ Standard Library?

The main containers in C++ Standard Library include vector, list, deque, set, map, unordered_set, and unordered_map.

Can you explain the differences between vector and list?

Sure! A vector is a dynamic array that allows random access, while a list is a doubly linked list that allows efficient insertions and deletions.

When should I use a map instead of an unordered_map?

Use a map when you need ordered keys and efficient range queries. Use unordered_map for faster access with no order.

What is the complexity of accessing elements in a vector?

Accessing elements in a vector has a time complexity of O(1) due to direct indexing.

Are there any performance considerations I should be aware of?

Yes, consider memory usage and resizing for vectors, and the overhead of pointers in lists. Choose based on your use case.