#include#include int main() { std::set mySet; mySet.insert(1); mySet.insert(2); mySet.insert(3); std::cout << "Size of set: " << mySet.size() << std::endl; return 0; }
#includeThis code creates a set with 5 elements and removes the element 3 from it using the erase() function. It then outputs the size of the set which should be 4. The cpp set is part of the C++ Standard Library.#include int main() { std::set mySet {1, 2, 3, 4, 5}; mySet.erase(3); std::cout << "Size of set: " << mySet.size() << std::endl; return 0; }