Python3练习题

a=input()
t=""
for c in a:
     if 'a'<=c<="z":
        t+=chr(ord('a')+((ord('c')-ord('a'))+3)%26)
     elif 'A' <= c <= 'Z':
        t += chr( ord('A') + ((ord(c)-ord('A')) + 3 )%26 )
     else:
        t += c
print(t)

import time
st=time.perf_counter()
scale=50
print("开始执行".center(scale//2,'-'))
for i in range(scale+1):
    a="*"*i
    b="-"*(scale-i)
    c=(i/scale)*100
    now=time.perf_counter()-st
    print("{:^3f}%[{}->{}]{:2f}".format(c,a,b,now))
    time.sleep(0.1)
print("结束执行".center(scale//2,'-'))

a=eval(input())
print("{:-^20}".format(pow(a,3)))

def dayUp(dayf):
    dayup=1
    for a in range(365):
        if a%7 in[6,0]:
            dayup=dayup*(1-0.01)
        else:
            dayup=dayup*(1+dayf)
    return dayup
dayf=0.01
while dayUp(dayf)<37.78:
    dayf+=0.001
print("工作日的努力参数是: {:.3f}".format(dayf))