c++, swap

/*.swap : 문자열을 서로 바꾼다*/

# include <iostream>

# include <string>

int main(void)

{

std::string s1 = "hello";

std::string s2 = "world";

s1.swap(s2);

std::cout << "s1 => " << s1 << "   s2 => " << s2 << std::endl;

return 0;

}