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#include <iostream> #include <string> #include <unordered_map> using namespace std; int main() { unordered_map<string, int> people = {{"John", 32}, {"Adele", 45}, {"Bo", 29}}; unordered_map<string, int> friends = {{"Jenny", 22}, {"Liam", 24}}; people.swap(friends); cout << "people has " << people.size() << " elements\n"; cout << "friends has " << friends.size() << " elements"; return 0; }
people has 2 elements
friends has 3 elements
