Welcome to our exploration of Compound Data Structures in C++. Having navigated through basic data structures, we'll delve into nested maps and vectors. These structures enable us to handle complex and hierarchical data, which is typical in real-world scenarios. This lesson will guide you through a recap of the basics, the creation and modification of nested maps and vectors, as well as common operations.

As a quick recap, std::vector is a dynamic array, while std::map is an associative container that stores key-value pairs. These structures can be nested. Here's a simple example of a school directory:

Just like their non-nested versions, creating nested structures is straightforward.

Nested Map:

Nested Vector:

Nested Maps and Vectors:

The retrieval of values from nested maps or vectors follows rules similar to those for their non-nested counterparts.

From Nested Map:

From Nested Vector:

From Both:

The modification of nested vectors and maps is similar to that of non-nested versions.

Operations on Nested Maps:

Operations on Nested Vectors:

Bravo! You've made a journey through nested vectors and maps, terms that are becoming increasingly common in the data-intensive programming world. We've learned how to create, access, and modify values in these complex structures.

Up next, we have hands-on practice sessions to solidify your understanding of these concepts. Hold on to your hats!