Input
Output
#include <iostream> #include <set> using namespace std; int main(void) { //Default Constructor std::set<int> s1; s1.insert(5); s1.insert(10); cout << "Size of set for s1 is : " << s1.size() << endl; set<int> s2(s1); // Copy constructor cout << "Size of set for s2 is : " << s2.size(); return 0; }