‘‘‘
【程序1】
題目：有1、2、3、4個(gè)數(shù)字，能組成多少個(gè)互不相同且無重復(fù)數(shù)字的三位數(shù)？都是多少？
1.程序分析：可填在百位、十位、個(gè)位的數(shù)字都是1、2、3、4。組成所有的排列后再去
　　　　　　掉不滿足條件的排列。?
2.程序源代碼：
‘‘‘
for?i?in?range（15）:
????for?j?in?range（15）:
????????for?k?in?range（15）:
????????????if（?i?!=?k?）?and?（i?!=?j）?and?（j?!=?k）:
????????????????print?ijk

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件????????468??2007-09-21?22:55??python經(jīng)典100例\JCP099.py

?????文件????????390??2007-09-15?11:46??python經(jīng)典100例\JCP001.py

?????文件???????1093??2007-09-15?13:09??python經(jīng)典100例\JCP002.py

?????文件????????782??2007-09-15?13:28??python經(jīng)典100例\JCP003.py

?????文件????????649??2007-09-15?13:44??python經(jīng)典100例\JCP004.py

?????文件????????362??2007-09-15?14:02??python經(jīng)典100例\JCP005.py

?????文件????????245??2007-09-15?14:02??python經(jīng)典100例\JCP006.py

?????文件????????392??2007-09-15?17:34??python經(jīng)典100例\JCP007.py

?????文件????????530??2007-09-15?14:23??python經(jīng)典100例\JCP008.py

?????文件????????583??2007-09-15?15:04??python經(jīng)典100例\JCP009.py

?????文件????????374??2007-09-15?15:10??python經(jīng)典100例\JCP010.py

?????文件????????660??2007-09-15?15:22??python經(jīng)典100例\JCP011.py

?????文件????????589??2007-09-15?15:29??python經(jīng)典100例\JCP012.py

?????文件????????444??2007-09-15?15:32??python經(jīng)典100例\JCP013.py

?????文件????????699??2007-09-15?15:40??python經(jīng)典100例\JCP014.py

?????文件????????403??2007-09-15?15:49??python經(jīng)典100例\JCP015.py

?????文件????????535??2007-09-15?16:09??python經(jīng)典100例\JCP017.py

?????文件????????410??2007-09-15?16:17??python經(jīng)典100例\JCP018.py

?????文件????????569??2007-09-15?17:06??python經(jīng)典100例\JCP019.py

?????文件????????344??2007-09-15?17:11??python經(jīng)典100例\JCP020.py

?????文件????????418??2007-09-15?17:16??python經(jīng)典100例\JCP021.py

?????文件????????742??2007-09-15?20:18??python經(jīng)典100例\JCP022.py

?????文件????????579??2007-09-15?20:25??python經(jīng)典100例\JCP023.py

?????文件????????565??2007-09-15?20:36??python經(jīng)典100例\JCP024.py

?????文件????????412??2007-09-15?20:53??python經(jīng)典100例\JCP025.py

?????文件????????275??2007-09-15?20:58??python經(jīng)典100例\JCP026.py

?????文件????????329??2007-09-15?21:14??python經(jīng)典100例\JCP027.py

?????文件????????494??2007-09-15?21:17??python經(jīng)典100例\JCP028.py

?????文件????????560??2007-09-15?21:26??python經(jīng)典100例\JCP029.py

?????文件????????340??2007-09-15?21:40??python經(jīng)典100例\JCP030.py

............此處省略70個(gè)文件信息