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// unordered_multimap::swap
#include <iostream>
#include <string>
#include <unordered_map>
int main ()
{
std::unordered_multimap<std::string,std::string>
a = {{"orange","FL"},{"apple","NY"},{"apple","WA"}},
b = {{"strawberry","LA"},{"strawberry","NC"},{"pear","OR"}};
a.swap(b);
std::cout << "a: ";
for (auto& x: a) std::cout << " " << x.first << ":" << x.second;
std::cout << std::endl;
std::cout << "b: ";
for (auto& x: b) std::cout << " " << x.first << ":" << x.second;
std::cout << std::endl;
return 0;
}
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