How to create a List of Sets in C++

How to create a List of Sets in C++ ?

Answer

In C++, you can create a list of sets using the list container from the STL for the outer list and the set container from the STL for the inner sets.

✐ Examples

1 Create List of Sets

In this example,

We include the necessary header files and .
We declare two inner sets named set1 and set2 using the std::set container.
We create an outer list named list_of_sets using the std::list container and initialize it with the inner sets.
Finally, we iterate through the list of sets and print each set to standard output.

C++ Program

#include <iostream>
#include <list>
#include <set>

int main() {
    std::set<int> set1 = {1, 2, 3};
    std::set<char> set2 = {'a', 'b', 'c'};

    std::list<std::set<int>> list_of_sets = {set1, set2};

    for (const auto& s : list_of_sets) {
        for (const auto& elem : s) {
            std::cout << elem << " ";
        }
        std::cout << std::endl;
    }

    return 0;
}

Output

1 2 3 
a b c

2 Create List of Sets with Empty Inner Sets

In this example,

We include the necessary header files and .
We declare two empty inner sets named empty_set1 and empty_set2.
We create an outer list named list_of_empty_sets using the std::list container and initialize it with the empty inner sets.
Finally, we iterate through the list of sets with empty inner sets and print each set to standard output.

C++ Program

#include <iostream>
#include <list>
#include <set>

int main() {
    std::set<int> empty_set1;
    std::set<char> empty_set2;

    std::list<std::set<int>> list_of_empty_sets = {empty_set1, empty_set2};

    for (const auto& s : list_of_empty_sets) {
        for (const auto& elem : s) {
            std::cout << elem << " ";
        }
        std::cout << std::endl;
    }

    return 0;
}

Output

Summary

In this tutorial, we learned How to create a List of Sets in C++ language with well detailed examples.

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How to create a List of Sets in C++

How to create a List of Sets in C++ ?

Answer

✐ Examples

1 Create List of Sets

C++ Program

Output

2 Create List of Sets with Empty Inner Sets

C++ Program

Output

Summary

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