class Coordinate: def __init__(self, x, y): # 横坐标 self.x = x # 纵坐标 self.y = y def __str__(self): print(f"({self.x}, {self.y})") # 利用对象累加传参 def __add__(self,c): self.x += c.x self.y += c.y return Coordinate(self.x, self.y) x1, y1 = list(map(int,input().split())) x2, y2 = list(map(int,input().split())...