Python语言程序设计基础(第二版)嵩天高等教育出版社第三章答案
3.1
step = 0.5
year = 10
weight = eval(input("请输入你在地球上的重量(KG):"))
weight_in_earth = weight+year*step
weght_in_month = weight_in_earth*0.165
print("十年后,你的体重为:\n地球上:{:.2f}\n月球上:{:.2f}".format(weight_in_earth, weght_in_month))
3.2
# 连续学习的天数
x = 0
# 天数
day = 0
# 初始能力值
base = 1
# 周期
cycle = 7
for day in range(365):
if 0 <= x < 3:
x += 1
elif 3 <= x < cycle:
x += 1
base *= (0.01+1)
elif x == 7:
x = 0
print("连续学习365天后,能力值为{:.2}".format(base))
3.3
# 连续学习的天数
x = 0
# 天数
day = 0
# 初始能力值
base = 1
# 周期
cycle = 7
for day in range(365):
# 每十天休息一次
if day%10 == 0:
x = 0
elif 0 <= x < 3:
x += 1
elif 3 <= x < cycle:
x += 1
base *= (0.01+1)
elif x == 7:
x = 0
print("连续学习365天后,能力值为{:.2}".format(base))
3.4
print("判断是否为回文数".center(20,'-'))
number = input("请输入一个数字:")
# 反转字符串
reverseNumber = number[::-1]
if eval(reverseNumber) == eval(number):
print("这个数字是回文数")
else:
print("不是回文数")
3.5
print("+ - - - - + - - - - + - - - - +")
for i in range(4):
print("\n| | | |")
print("\n")
print("+ - - - - + - - - - + - - - - +")
for i in range(4):
print("\n| | | |")
print("\n")
print("+ - - - - + - - - - + - - - - +")
3.6
import time
print("程序开始".center(50,'-'))
print("Starting", end='')
for i in range(50):
print("·",end='')
time.sleep(0.1)
print("Done!")
print("程序结束".center(50,'-'))
3.7
这道题虽然是让观察结果,但是书中给出的有一些小的瑕疵。仔细观察就可以发现,转动的并不是按照顺序转的,应该把第三个和第四个字符调换才正确!
import time
while True:
for i in ["/", "-", "\\","|", "|"]:
print("{:s}\r".format(i),end='')
time.sleep(0.1)
3.8
首先需要安装 tqdm 第三方库,但是实际运行的结果并不是那么好。不知道书的作者是怎么想的。
pip install tqdm
最后修改于 2020-10-25