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// swap strings
#include <iostream>
#include <string>
main ()
{
std::string buyer ("money");
std::string seller ("goods");
std::cout << "Before the swap, buyer has " << buyer;
std::cout << " and seller has " << seller << '\n';
seller.swap (buyer);
std::cout << " After the swap, buyer has " << buyer;
std::cout << " and seller has " << seller << '\n';
return 0;
}
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