How to check if a List contains all the elements of Another List in C++

How to check if a List contains all the elements of Another List in C++ ?

Answer

To check if a list contains all the elements of another list in C++, you can iterate over one list and check the presence of each element in the other list using nested loops.

✐ Examples

1 Check if List Contains All Elements of Another List (Positive Scenario)

In this example,

We create two lists named list1 and list2 with different values.
We iterate over list2 and check if each element is present in list1.
If all elements of list2 are found in list1, we conclude that list1 contains all elements of list2.
Finally, we print the result to standard output.

C++ Program

#include <iostream>
#include <list>

int main() {
    std::list<int> list1 = {1, 2, 3, 4, 5};
    std::list<int> list2 = {2, 4};
    bool result = true;
    for (int num : list2) {
        if (std::find(list1.begin(), list1.end(), num) == list1.end()) {
            result = false;
            break;
        }
    }
    std::cout << "List 1 contains all elements of List 2: " << std::boolalpha << result << std::endl;
    return 0;
}

Output

List 1 contains all elements of List 2: true

2 Check if List Contains All Elements of Another List (Negative Scenario)

In this example,

We create two lists named list1 and list2 with different values.
We iterate over list2 and check if each element is present in list1.
If any element of list2 is not found in list1, we conclude that list1 does not contain all elements of list2.
Finally, we print the result to standard output.

C++ Program

#include <iostream>
#include <list>

int main() {
    std::list<int> list1 = {1, 2, 3, 4, 5};
    std::list<int> list2 = {2, 4, 6};
    bool result = true;
    for (int num : list2) {
        if (std::find(list1.begin(), list1.end(), num) == list1.end()) {
            result = false;
            break;
        }
    }
    std::cout << "List 1 contains all elements of List 2: " << std::boolalpha << result << std::endl;
    return 0;
}

Output

List 1 contains all elements of List 2: false

Summary

In this tutorial, we learned How to check if a List contains all the elements of Another List in C++ language with well detailed examples.

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How to check if a List contains all the elements of Another List in C++

How to check if a List contains all the elements of Another List in C++ ?

Answer

✐ Examples

1 Check if List Contains All Elements of Another List (Positive Scenario)

C++ Program

Output

2 Check if List Contains All Elements of Another List (Negative Scenario)

C++ Program

Output

Summary

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