ProgramGuruIn C++, you can utilize the std::set container from the Standard Template Library (STL) to represent a set and perform set operations.
In this example,
<set> header to use the std::set container from the Standard Template Library (STL).std::set objects, set1 and set2, and insert elements into them.std::set, unionSet, to store the union of set1 and set2.std::set_union algorithm from the STL to find the union of set1 and set2, and store the result in unionSet.unionSet to display the union of the two sets.#include <iostream>
#include <set>
#include <algorithm>
#include <iterator>
int main() {
std::set<int> set1 = {1, 2, 3};
std::set<int> set2 = {3, 4, 5};
std::set<int> unionSet;
std::set_union(set1.begin(), set1.end(), set2.begin(), set2.end(), std::inserter(unionSet, unionSet.begin()));
std::cout << "Union of set1 and set2:\n";
for (int num : unionSet) {
std::cout << num << " ";
}
return 0;
}Union of set1 and set2: 1 2 3 4 5
In this example,
std::set objects, set1 and set2, to represent the sets.unionSets that takes references to set1 and set2 as parameters.unionSets function, we iterate over each element of set2 and insert it into set1 if it's not already present.unionSets function with set1 and set2.set1 to display the union set.#include <iostream>
#include <set>
void unionSets(std::set<int>& set1, const std::set<int>& set2) {
for (int num : set2) {
set1.insert(num);
}
}
int main() {
std::set<int> set1 = {1, 2, 3};
std::set<int> set2 = {3, 4, 5};
unionSets(set1, set2);
std::cout << "Union of set1 and set2:\n";
for (int num : set1) {
std::cout << num << " ";
}
return 0;
}Union of set1 and set2: 1 2 3 4 5
In this tutorial, we learned How to find Union of Two Sets in C++ language with well detailed examples.