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class Point:
xpos = 0
ypos = 0
def __init__(self, x=0, y=0):
self.xpos = x
self.ypos = y
def __str__(self):
return 'Point at (%f,%f)'%(self.xpos, self.ypos)
def __add__(self, other):
xpos = self.xpos + other.xpos
ypos = self.ypos + other.ypos
res = Point(xpos,ypos)
return res
def __sub__(self, other):
import math
dx = self.xpos - other.xpos
dy = self.ypos - other.ypos
return math.sqrt(dx**2+dy**2)
def dist(self):
import math
return math.sqrt(self.xpos**2 + self.ypos**2)
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