pythonÓï·¨½éÉÜ
1.1. Óï·¨
1.1.1. if
>>> x=int(raw_input("please enter an integer:"))
please enter an integer:-8
>>> if x<0:
... print 'negative'
... elif x==0:
... print 'zero'
... else:
... print 'positive'
...
negative
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if ±í´ïʽ
then ÃüÁî±í
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¾Ù¸ö¼òµ¥µÄÀý×Ó£ºifsingle
#!/bin/bash
#filename:ifsingle
echo "please enter the first string:"
read word1
echo "please enter the second string:"
read word2
echo "_______________"
if test $word1 = $word2 ÕâÀï×¢Òâ$word1ºÍ$word2Ö®¼äµÄµÈºÅǰºó±ØÐëÓпոñ£¬²»È»¾Í±ä³ÉÁ˸³ÖµÓï¾ä£¬³ÌÐòµÄ¹¦ÄܾÍÌåÏÖ²»³öÀ´ÁË¡£
then
echo " the first string is equal to the second string"
fi
echo "the program has finished"
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#!/bin/bash
#filename:ifelif
echo "please enter the first argu:"
read str1 z×¢ÒâÕâÀïÇв»ÒªÊ¹ÓÃ$1£¬ÒòΪ$1ÊÇÖ¸³ýÁ˳ÌÐòÃûµÄµÚÒ»¸ö²ÎÊý
echo "please enter the second argu:"
read str2
echo "please enter the third argu:"
read str3
if test $str1 = $str2 -a $str2 = $str3 test ÓÃ[ ]ÊÇtestµÄÓï·¨£¬ÐèÒªÓÃ-a±íʾÂß¼Ó룬µ±È»test Ò²¿ÉÒÔ²»ÊµÓÃ[]
then
echo "the three argu are same"
elif test $str1 = $str2
then
echo "the first argu is equal to the second argu"
elif test $str2 = $str3
then
echo "the second argu is equal to the third argu"
elif test $str1 = $str3
then
echo "the third argu is equal to the first argu"
else
echo " they are different"
fi
2
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import sys, pygame, time
size = width, height = 700,700
fontColor = (0,0,255)
class walk:
'''This is a game about war.
Just like war 3.'''
def __init__(self):
'''Init the screen.
Get param and init the screen'''
#print ('this is init funnction') ......
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entry: 1
entry: 4
entry: 5
entry: 6
(4/(1-(5/6))) = 24
(6/((5/4)-1)) = 24
Press any key to exit...
entry: 3
entry: 3
entry: 8
entry: 8
(8/(3-(8 ......