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#include <iostream> #include <iomanip> #include <set> #include <algorithm> #include <iterator> using namespace std; set<int>& operator<<(set<int>& s, int x){ s.insert(x); return s; } int main(){ set<int> a, b; a << 1 << 3 << 4 << 5; b << 2 << 3 << 4 << 6; cout << "set 1: "; copy(a.begin(), a.end(), ostream_iterator<int>(cout, " ")); cout << "\n"; cout << "set 2: "; copy(b.begin(), b.end(), ostream_iterator<int>(cout, " ")); cout << "\n"; cout << "intersection: "; set_intersection(a.begin(), a.end(), b.begin(), b.end(), ostream_iterator<int>(cout, " ")); cout << "\n"; cout << "difference: "; set_difference(a.begin(), a.end(), b.begin(), b.end(), ostream_iterator<int>(cout, " ")); cout << "\n"; cout << "union: "; set_union(a.begin(), a.end(), b.begin(), b.end(), ostream_iterator<int>(cout, " ")); cout << "\n"; }
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