Question

python关于循环语句的 练习题 2道 求助 在线等~~！！

题目2..

Answer 1

import sys

tmpy = sys.stdin.readlines()

cold = 0
warm = 0

for i in tmpy:
if int(i) <= 60:
cold = cold + 1
if int(i) >= 80:
warm = warm + 1

print "cold = ", cold
print "warm = ", warm

用ctrl＋d结束输入

Answer 2

你的题呢？

追问

题目1

追答

晕。你们是用英文出题的啊。

heating_degree_days=0
cooling_degree_days=0

while 1:
s_input=raw_input("please input the average daily temps, press q to finish your input:")
if s_input=="q":
print("total heating degree-days is %d" %(heating_degree_days,))
print("total cooling degree-days is %d" %(cooling_degree_days,))
break;
degree=int(s_input)

if degree80:
cooling_degree_days+=degree

追问

大师啊。。。这道求您了 分会给您的啊

追答

import Tkinter

class MyCanvas:
def __init__(self,root,para_width,para_height):
self.canvas = Tkinter.Canvas(root,bg = 'white', width=para_width,height=para_height)

self.width=para_width
self.height=para_height

self.canvas.pack()
self.canvas.bind('',self.onClick)

self.count=0.0
self.sum_x=0.0
self.sum_y=0.0
self.sum_product_xy=0.0
self.sum_sqr_x=0.0

self.readyToQuit=False

self.canvas.create_rectangle(5,self.height,50,self.height-35, fill="yellow")
self.canvas.create_text(25,self.height-20,text="Done",activefill="blue")

def onClick(self,event):

if self.readyToQuit:
root.quit()

x=event.x
y=event.y

if (x>=5 and x=self.height-30 and y<=self.height):
self.drawLine()
return
self.canvas.create_oval(x-2,y-2,x+2,y+2,fill="black") #draw the point

self.count+=1
self.sum_x+=x
self.sum_y+=y
self.sum_product_xy+=x*y
self.sum_sqr_x+=x**2

def drawLine(self):
if self.count<2: #only one point or no point can not make a line
return;
m=(self.sum_product_xy-self.sum_x*self.sum_y/self.count)/(self.sum_sqr_x-self.sum_x**2/self.count)
y1=self.sum_y/self.count+m*(0-self.sum_x/self.count)
y2=self.sum_y/self.count+m*(self.width-self.sum_x/self.count)

self.canvas.create_line(0,int(y1),self.width,int(y2),fill="red")

self.readyToQuit=True

root = Tkinter.Tk()
canvas = MyCanvas(root,800,600)

root.mainloop()