int x;
private:
int y;
public:
point(int x,int y){this->x=x;this->y=y;}point(int x,int
阅读背景：
C++操作符函数
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int x;
private:
int y;
public:
point(int x,int y){this->x=x;this->y=y;}point(int x,int
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