C++学习笔记（二十三）：c++ 运算符重载

• c++支持运算符重载，允许在程序中定义或更改运算符的行为。

• #include
  #include
  
  struct Vector2 
  {
  	float x, y;
  	Vector2()
  	{}
  	Vector2(float x, float y)
  		:x(x), y(y)
  	{}
  	//返回值类型Vector2  operator (参数)
  	Vector2 operator+ (Vector2 v)
  	{
  		Vector2 temp;
  		temp.x = x + v.x;
  		temp.y = y + v.y;
  		return temp;
  	}
  };
  
  int main()
  {
  	Vector2 v1(1.0, 4.3);
  	Vector2 v2(7.3, 9.8);
  	//实现两个Vector类对象的属性相加
  	//重载运算符+
  	Vector2 v3 = v1 + v2;
  	std::cout << v3.x << std::endl;
  	std::cin.get();
  	return 0;
  }

• #include
  #include
  
  struct Vector2 
  {
  	float x, y;
  	Vector2()
  	{}
  	Vector2(float x, float y)
  		:x(x), y(y)
  	{}
  	//返回值类型Vector2  operator (参数)
  	Vector2 operator+ (Vector2 v)
  	{
  		Vector2 temp;
  		temp.x = x + v.x;
  		temp.y = y + v.y;
  		return temp;
  	}
  };
  //重写 << 操作符
  std::ostream& operator<< (std::ostream& stream, const Vector2& other)
  {
  	stream << other.x << " " << other.y;
  	return stream;
  }
  int main()
  {
  	Vector2 v1(1.0, 4.3);
  	Vector2 v2(7.3, 9.8);
  	//实现两个Vector类对象的属性相加
  	//重载运算符+
  	Vector2 v3 = v1 + v2;
  	std::cout << v3 << std::endl;
  	std::cin.get();
  	return 0;
  }