How to check if a Set contains all the items of Another Set in C++ - Step by Step Examples

How to check if a Set contains all the items of Another Set in C++ ?

Answer

To check if a set contains all the items of another set in C++, you can iterate through the elements of the second set and use the find method of the first set.

✐ Examples

1 Check if One Set is a Subset of Another Set

In this example,

We create two sets named setA and setB containing some elements.
We iterate through the elements of setB and check if each element exists in setA using the find method.
If any element of setB is not found in setA, we conclude that setA is not a subset of setB.
Otherwise, we conclude that setA is a subset of setB.

C++ Program

#include <iostream>
#include <set>

int main() {
    std::set<int> setA = {1, 2, 3, 4, 5};
    std::set<int> setB = {2, 3};
    bool isSubset = true;
    for (const auto& elem : setB) {
        if (setA.find(elem) == setA.end()) {
            isSubset = false;
            break;
        }
    }
    std::cout << "Is setA a subset of setB? " << (isSubset ? "true" : "false") << std::endl;
    return 0;
}

Output

Is setA a subset of setB? true

2 Check if One Set is a Superset of Another Set

In this example,

We create two sets named setA and setB containing some elements.
We iterate through the elements of setA and check if each element exists in setB using the find method.
If any element of setA is not found in setB, we conclude that setA is not a superset of setB.
Otherwise, we conclude that setA is a superset of setB.

C++ Program

#include <iostream>
#include <set>

int main() {
    std::set<int> setA = {1, 2, 3, 4, 5};
    std::set<int> setB = {2, 3};
    bool isSuperset = true;
    for (const auto& elem : setA) {
        if (setB.find(elem) == setB.end()) {
            isSuperset = false;
            break;
        }
    }
    std::cout << "Is setA a superset of setB? " << (isSuperset ? "true" : "false") << std::endl;
    return 0;
}

Output

Is setA a superset of setB? true

Summary

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

◀ Previous Next ▶

C++ Tutorials

C++ How-Tos

How to check if a Set contains all the items of Another Set in C++ - Step by Step Examples

How to check if a Set contains all the items of Another Set in C++ ?

Answer

✐ Examples

1 Check if One Set is a Subset of Another Set

C++ Program

Output

2 Check if One Set is a Superset of Another Set

C++ Program

Output

Summary

More C++ Sets Tutorials