How to create a List of Lists in C++

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

Answer

To create a list of lists in C++ using `std::list`, you can create a list of lists by specifying lists as elements of the outer list.

✐ Examples

1 Create List of Lists

In this example,

We include the necessary header file .
We create two inner lists named list1 and list2.
We create a list named listOfLists using std::list> and initialize it with the inner lists.
Finally, we print the list of lists to standard output.

C++ Program

#include <iostream>
#include <list>

int main() {
    std::list<int> list1 = {1, 2, 3};
    std::list<char> list2 = {'a', 'b', 'c'};
    std::list<std::list<int>> listOfLists = {list1, list2};
    for (const auto& innerList : listOfLists) {
        for (const auto& element : innerList) {
            std::cout << element << ' ';
        }
        std::cout << '\n';
    }
    return 0;
}

Output

1 2 3 
a b c

2 Create List of Lists with Empty Inner Lists

In this example,

We include the necessary header file .
We create an empty list named listOfListsEmpty using std::list>.
We create two empty inner lists named list3 and list4.
We use the push_back method to add the inner lists list3 and list4 to the outer list listOfListsEmpty.
Finally, we print the list of lists with empty inner lists to standard output.

C++ Program

#include <iostream>
#include <list>

int main() {
    std::list<std::list<int>> listOfListsEmpty;
    std::list<int> list3;
    std::list<char> list4;
    listOfListsEmpty.push_back(list3);
    listOfListsEmpty.push_back(list4);
    for (const auto& innerList : listOfListsEmpty) {
        for (const auto& element : innerList) {
            std::cout << element << ' ';
        }
        std::cout << '\n';
    }
    return 0;
}

Output

Summary

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

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How to create a List of Lists in C++

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

Answer

✐ Examples

1 Create List of Lists

C++ Program

Output

2 Create List of Lists with Empty Inner Lists

C++ Program

Output

Summary

More C++ Lists Tutorials