#include#include int main() { std::set mySet; // create an empty set of integers std::cout << "The size of the set is: " << mySet.size() << std::endl; // prints 0 return 0; }
#includeIn this example, we created an empty Set of integers with a custom comparison function `myCompare` that sorts integers in descending order. We then inserted some elements into the Set using the `insert()` function and iterated over the Set using a range-based for loop to print the elements in descending order. The Set container in C++ is part of the STL (Standard Template Library) and is available in the#include bool myCompare(int a, int b) { return a > b; // sort integers in descending order } int main() { std::set mySet(&myCompare); // create an empty set of integers with custom comparison function mySet.insert(3); mySet.insert(1); mySet.insert(5); for (const auto& elem : mySet) { std::cout << elem << " "; } // prints 5 3 1 return 0; }