《python语言程序设计课后题》第5章编程题答案（5.31~5.40）

wg19830119

5.31:

year=eval(input('enter the year of you want :'))

what_day=eval(input('enter the first day of one year: '))

def calender(month,year,what_day,days):

   print(format(str(month)+str(year),'^50s'))

   print('-'*50)

   print('Sun\tMon\tTue\tWed\tThu\tFri\tSat\t')

   print('  \t'*what_day,end='')

   count=0

   for i in range(1,days+1):

       print(format(i,'^3d'),end=''+'\t')

       count+=1

       if (what_day+count) % 7==0:

            print()

   print()

calender('January',year,what_day,31)

FebFirstDay=(what_day+31 % 7) % 7

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

   days=29

else:

   days=28

calender('February',year,FebFirstDay,days)

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

   MarFirstDay=(FebFirstDay+29 % 7) % 7

else:

   MarFirstDay=(FebFirstDay+28 % 7) % 7

calender('March',year,MarFirstDay,31)

AprFirstDay=(MarFirstDay+31 % 7) % 7

calender('April',year,AprFirstDay,30)

MayFirstDay=(AprFirstDay+30 % 7) % 7

calender('May',year,MayFirstDay,31)

JunFirstDay=(MayFirstDay+31 % 7) % 7

calender('June',year,JunFirstDay,30)

JulFirstDay=(JunFirstDay+30 % 7) % 7

calender('July',year,JulFirstDay,31)

AugFirstDay=(JulFirstDay+31 % 7) % 7

calender('August',year,AugFirstDay,31)

SepFirstDay=(AugFirstDay+31 % 7) % 7

calender('September',year,SepFirstDay,30)

OctFirstDay=(SepFirstDay+30 % 7) % 7

calender('October',year,OctFirstDay,31)

NovFirstDay=(OctFirstDay+31 % 7) % 7

calender('November',year,NovFirstDay,30)

DecFirstDay=(NovFirstDay+30 % 7) % 7

calender('December',year,DecFirstDay,31)

5.32:

amount=eval(input('enter an amount:'))

year_rate=eval(input('enter the year_rate:'))

month=eval(input('enter the month:'))

total=0

for i in range(1,month+1):

   total=(100+total)*(1+year_rate/1200)

print(format(total,'.3f'))

5.33:

amount=eval(input('enter an amount:'))

year_rate=eval(input('enter the year_rate:'))

month=eval(input('enter the month:'))

total=amount*(1+year_rate/1200)

print('Month\tCD Value')

print(format('1','5s')+'\t'+format(total,'.2f'))

for i in range(2,month+1):

   total=total*(1+year_rate/1200)

   print(format(i,'<5d')+'\t'+format(total,'.2f'))

5.34:

import random

a=random.randint(0,9)

b=random.randint(0,9)

while a==b:

   b=random.randint(0,9)

else:

   if a == 0:

       print(str(a)+str(b))

   else:

       number=a*10+b

       print(number)

5.35:

number=10000

for j in range(2,number+1):

   sum=0

   for i in range(1,j):

       if j % i == 0:

            sum+=i

   if sum == j:

       print(j)

5.36:

import random

count1=0

count2=0

while count1 < 2 and count2 < 2:

   guess=eval(input('enter scissor(0),rock(1),paper(2):'))

   computer=random.randint(0,2)

   if guess == computer:

       print('computer is'+str(computer)+',it is draw!')

   elif (guess==0 and computer==1) or (guess==1 and computer==2) or (guess==2 and computer==0):

       print('computer is'+str(computer)+',computer win!')

       count1+=1

   elif (guess==0 and computer==2) or (guess==1 and computer==0) or (guess==2 and computer==1):

       print('computer is'+str(computer)+',you win!')

       count2+=1

print('computer win '+str(count1)+' times,you win '+str(count2)+' times,game over!')

5.37:

import math

sum=0

for i in range(1,625):

   sum=sum+1/(math.sqrt(i)+math.sqrt(i+1))

print(sum)

5.38:

import time

number=eval(input('enter the number of seconds:'))

while number > 0:

   print(str(number)+'seconds remaining')

   time.sleep(1)

   number-=1

print('stopped')

5.39:

salary=5000

fees=0

number=0.01

while (salary+fees)<30000:

   if 0.01 <= number <= 5000:

       fees=number * 8 /100

   elif 5000 < number <= 10000:

       fees=5000*8/100+(number-5000)*10/100

   elif 10000 < number :

       fees=5000*8/100+5000*10/100+(number-10000)*12/100

   number+=0.01

print(number,salary+fees)

5.40:

import random

count1=0

count2=0

for i in range(1000000):

   number=random.randint(0,1)

   if number==0:

       count1+=1

   else:

       count2+=1

print('正面出现了'+str(count1)+'次，反面出现了'+str(count2)+'次')

zhxxuan

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zhape26

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Mae

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