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交作业咯！

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M-R胖

#1 Created at ... [Delete] [Delete and Lock User]

交作业=。=自己多加点已知的内容。

在此插入代码

自己输入成绩：
s1 = int(input('input you old res:'))
s2 = int(input('input you new res:'))
r = 1-s1/s2
print('小明成绩提升了:%.2f%%'%r)

不用输入：
s1 = 72
s2 = 85
r = 1-s1/s2
print('小明成绩提升了:%.2f%%'%r)

M-R胖

#2 Created at ... [Delete] [Delete and Lock User]

我的错，忘记乘100了。。。马虎了，要谨记这教训了！

在此插入代码

s1 = int(input('input you old res:'))
s2 = int(input('input you new res:'))
r = 100*(1-s1/s2)
print('小明成绩提升了:%.2f%%'%r)

s1 = 72
s2 = 85
r = 100*(1-s1/s2)
print('小明成绩提升了:%.2f%%'%r)

三片子

#3 Created at ... [Delete] [Delete and Lock User]

汗， 之前不知道int,直接input成绩，结果python说-不能应用于字符直接按才先起来，看评论发现int,对了我写的是带名字的，怎么输入中文，慢慢来吧

#!usr/bin/env python3
#_*_coding:utf-8_*_



name=input('please enter your name:')
s1=int(input('please enter your grade last year:'))
s2=int(input('please enter your grade this year:'))
r=s2-s1
r=r/s1*100
print('hello,%s,you changed %.1f%%.'%(name,r))
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