《Python语言程序设计》 第6章编程题答案（6.11~6.19）

wg19830119

6.11：

def computcommission(salesAmount):

   if 0.01 < salesAmount <= 5000:

       commission=salesAmount * 8 / 100

   elif 5000 < salesAmount <= 10000:

       commission=5000*8/100+(salesAmount-5000)*10/100

   else:

       commission=5000*8/100+5000*10/100+(salesAmount-10000)*12/100

   return commission

def title():

   print('-'*30)

   print('Sales Amount    | Commission')

   print('-'*30)

def main():

   title()

   for i in range(10000,105000,5000):

       print(' ',format(i,'^6d'),'\t',end='')

       print('|',end='')

       print(' ',format(computcommission(i),'^7.1f'))

main()

6.12：

def printChars(ch1,ch2,numberPerLine):

   a=ord(ch1)

   b=ord(ch2)

   count=0

   for i in range(a,b+1):

       print(chr(i),end='')

       count+=1

       if count % numberPerLine ==0:

            print()

printChars('1','Z',5)

6.13：

def progression(number):

   sum=0

   for i in range(1,number+1):

       sum+=i/(i+1)

       print(format(i,'6d'),end='|')

       print(format(sum,'^8.4f'))

       print('-'*20)

number=eval(input('number:'))

print('-'*20)

print(format('i','>6s'),end='|')

print(format('m(i)','^6s'))

progression(number)

6.14：

def progression(number):

   sum=0

   for i in range(1,number+1):

       sum+=4 * ( ( (-1) ** (i+1) ) / (2*i-1) )

   print(format(i,'6d'),end='|')

   print(format(sum,'^8.4f'))

   print('-'*20)

number=eval(input('number:'))

print('-'*20)

print(format('i','>6s'),end='|')

print(format('m(i)','^6s'))

for i in range(1,number+1,100):

   progression(i)

6.15：

略

6.16：

def numberOfDaysInYear(year):

   if (year % 4==0 and year % 100 !=0) or (year % 400 ==0):

       days=366

   else:

       days=365

   return days

for i in range(2010,2021):

   print(str(i)+'year has '+str(numberOfDaysInYear(i))+'days')

6.17：

import math

def isValid(side1,side2,side3):

   if (side1+side2)>=side3 and (side2+side3)>=side1 and (side1+side3)>=side2 :

       return True

   else:

       print('Input is invaild')

def area(side1,side2,side3):

   if isValid(side1,side2,side3):

       s=(side1+side2+side3)/2

       area=math.sqrt(s*(s-side1)*(s-side2)*(s-side3))

       return area

side1,side2,side3=eval(input('enter three sides in double:'))

print('the area of the triangle is '+str(area(side1,side2,side3)))

6.18：

import random

def printmatrix(n):

   for i in range(1,n+1):

       print(random.randint(0,1),end='')

       for j in range(1,n):

            print(random.randint(0,1),end='')

       print()

printmatrix(eval(input('enter n:')))

6.19：

def leftOfTheLine(x0,y0,x1,y1,x2,y2):

   if (x1-x0)*(y2-y0)-(x2-x0)*(y1-y0)>0:

       print('p2 on the left of line')

def onTheSameLine(x0,y0,x1,y1,x2,y2):

   if (x1-x0)*(y2-y0)-(x2-x0)*(y1-y0)<0:

       print('p2 on the same line')

def leftOfTheLine(x0,y0,x1,y1,x2,y2):

   if (x1-x0)*(y2-y0)-(x2-x0)*(y1-y0)==0:

       print('p2 on the right of line')

x0,y0,x1,y1,x2,y2=eval(input('enter p0,p1,p2:'))

leftOfTheLine(x0,y0,x1,y1,x2,y2)

onTheSameLine(x0,y0,x1,y1,x2,y2)

leftOfTheLine(x0,y0,x1,y1,x2,y2)

test233

支持楼主，用户楼主，楼主英明呀！！！

dukangming

我擦！我要沙发！