c-resources/CPlusPlus20ForProgrammers-m.../examples/ch08/fig08_04.cpp

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// fig08_04.cpp
// Using the swap function to swap two strings.
#include <fmt/format.h>
#include <iostream>
#include <string>
int main() {
std::string s1{"one"};
std::string s2{"two"};
std::cout << fmt::format("Before swap:\ns1: {}; s2: {}", s1, s2);
s1.swap(s2); // swap strings
std::cout << fmt::format("\n\nAfter swap:\ns1: {}; s2: {}", s1, s2);
}
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