一篇文章带你了解c++运算符重载

#include <compare>
// return type deduced as std::strong_ordering
friend auto operator<=>(point p1, point p2) = default;
int x_;
int y_;
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#include <iOStream> 2
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class point { 4
public: 5
point(int x, int y) 6
: x_{x} 7
, y_{y} {} 8
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// hidden friend - preferred 10
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private: 14
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}; 17
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auto main() -> int { 19
auto const p2 = point{1, 2}; 20
auto const p1 = point{1, 2}; 21
std::cout << "p1 == p2 " << (p1 == p2) << '\n'; 22
std::cout << "p1 != p2 " << (p1 != p2) << '\n'; 23
std::cout << "p1 < p2 " << (p1 < p2) << '\n'; 24
std::cout << "p1 > p2 " << (p1 > p2) << '\n'; 25
std::cout << "p1 <= p2 " << (p1 <= p2) << '\n'; 26
std::cout << "p1 >= p2 " << (p1 >= p2) << '\n'; 27
}