Set: In C++, an associative container which is used to store the unique values is referred as “set”. A “set” container can be implemented using the STL (Standard Template Library) class “set” template. The importance of set are discussed as follow as: “set” elements must be “unique”, which means two elements in a “set” cannot have same values. Value of the element in a set cannot be modified, but they can be inserted or removed. “set” elements are automatically sorted in ascending order. Multiset: They are the associative containers which is similar to set. Here, multiple elements can have same values. To use multiset class, we need to include “#include <set>” header file. Unordered_set: They are the container class. They store the unique elements. These unique elements do not follow a particular order. Fast retrieval of unique elements takes place based on their value. Unordered_multiset: They are the container class. The elements stored here do not follow any particular order. It is similar to that of the “unordered_set” but they allow different elements to have equivalent values.

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Chapter 17.5, Problem 17.35CP

Program Plan Intro

Set:

In C++, an associative container which is used to store the unique values is referred as “set”.

A “set” container can be implemented using the STL (Standard Template Library) class “set” template. The importance of set are discussed as follow as:

“set” elements must be “unique”, which means two elements in a “set” cannot have same values.

Value of the element in a set cannot be modified, but they can be inserted or removed.

“set” elements are automatically sorted in ascending order.

Multiset:

They are the associative containers which is similar to set.

Here, multiple elements can have same values.

To use multiset class, we need to include “#include <set>” header file.

Unordered_set:

They are the container class.

They store the unique elements.

These unique elements do not follow a particular order.

Fast retrieval of unique elements takes place based on their value.

Unordered_multiset:

They are the container class.

The elements stored here do not follow any particular order.

It is similar to that of the “unordered_set” but they allow different elements to have equivalent values.

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