習題 11:提問
開門見山,先敲點代碼
ex11.py
# -*- coding: utf-8-*-
print "How old are you?",
age =raw_input()
print "How tall are you?",
height = raw_input()
print "How much do you weigh?",
weight = raw_input()
print "So you're %r old, %r tall and %rheavy."% (
age, height, weight)
運行結果:
感悟與自我測試:
在此簡單說下%r和%s的個人理解
%r是string轉義成repr，輸出對python比較友好
%s直接是str,它的輸出對於用戶比較友好
raw_input(),python的內建函數，通過讀取讀取控制檯的輸入實現用戶交互。
相似的內建函數還有input(),
raw_input直接讀取控制檯的輸出，支持任意類型的輸入。
Input()則希望能夠讀取一個合法的python表達式，必須使用引號括起來,儘量避免使用此函數
具體請看以下test
ex11_3.py
# -*- coding:utf-8-*-
print "what do you like?",
this =raw_input()
print"Oh,yes. I think %r is verygood!"%this
print "what do you like?",
that =input()
print"Oh,yes. I think %s is verygood!"%that
運行結果:
下面再簡單測下raw_input()與input()的區別
ex11_2.py raw_input()
# -*- coding:utf-8-*-
print "How old are you?",
your_ages = raw_input()
print "How old are your brother?",
your_brother_ages = raw_input()
print"So ,your brother are older %r yearsthan you."%(your_brother_ages- your_ages)
運行結果:
ex11_2_2.py input()
# -*- coding:utf-8-*-
print "How old are you?",
your_ages = input()
print "How old are your brother?",
your_brother_ages = input()
print"So ,your brother are older %r yearsthan you."%(your_brother_ages- your_ages)
運行結果:
ex11_2_3.py input() ------實驗中輸出語法不對請忽視····
# -*- coding:utf-8-*-
print "How old are you?",
your_ages = input()
print "How old are your brother?",
your_brother_ages = input()
print"So ,your brother are older %r yearsthan you."%(your_brother_ages+ your_ages)
運行結果:
x = int(raw_input()) 個人理解爲簡單的嵌套函數
ex11_4.py
# -*- coding: utf-8-*-
print "How much money do you have?",
x =int(raw_input())
print "Oh, you have %r money."%x
運行結果:
