如何在类中添加成对的向量？

class Vector:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def add(self, other):
        """向量相加"""
        new_x = self.x + other.x
        new_y = self.y + other.y
        return Vector(new_x, new_y)

    def subtract(self, other):
        """向量相减"""
        new_x = self.x - other.x
        new_y = self.y - other.y
        return Vector(new_x, new_y)

    def dot_product(self, other):
        """向量点积"""
        return self.x * other.x + self.y * other.y

    def cross_product(self, other):
        """向量叉积"""
        return self.x * other.y - self.y * other.x

# 创建两个向量对象
vector1 = Vector(2, 3)
vector2 = Vector(4, 5)

# 向量相加
result_add = vector1.add(vector2)
print("向量相加结果：", result_add.x, result_add.y)

# 向量相减
result_subtract = vector1.subtract(vector2)
print("向量相减结果：", result_subtract.x, result_subtract.y)

# 向量点积
result_dot = vector1.dot_product(vector2)
print("向量点积结果：", result_dot)

# 向量叉积
result_cross = vector1.cross_product(vector2)
print("向量叉积结果：", result_cross)