#include#include int main() { std::unordered_set mySet; std::cout << "Size of mySet: " << mySet.size() << std::endl; return 0; }
Size of mySet: 0
#include#include int main() { std::unordered_set mySet = {1, 2, 3, 4, 5}; std::cout << "Size of mySet: " << mySet.size() << std::endl; return 0; }
Size of mySet: 5In this example, a HashSet with 5 integers is created and the size() method is used to determine its size, which is 5. Package Library: STL (Standard Template Library)