‘‘‘
【程序1】
題目：有1、2、3、4個數(shù)字，能組成多少個互不相同且無重復數(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????時間???名稱
-----------?---------??----------?-----??----

?????文件????????468??2007-09-21?22:55??JCP099.py

?????文件????????390??2007-09-15?11:46??JCP001.py

?????文件???????1093??2007-09-15?13:09??JCP002.py

?????文件????????782??2007-09-15?13:28??JCP003.py

?????文件????????649??2007-09-15?13:44??JCP004.py

?????文件????????362??2007-09-15?14:02??JCP005.py

?????文件????????245??2007-09-15?14:02??JCP006.py

?????文件????????392??2007-09-15?17:34??JCP007.py

?????文件????????530??2007-09-15?14:23??JCP008.py

?????文件????????583??2007-09-15?15:04??JCP009.py

?????文件????????374??2007-09-15?15:10??JCP010.py

?????文件????????660??2007-09-15?15:22??JCP011.py

?????文件????????589??2007-09-15?15:29??JCP012.py

?????文件????????444??2007-09-15?15:32??JCP013.py

?????文件????????699??2007-09-15?15:40??JCP014.py

?????文件????????403??2007-09-15?15:49??JCP015.py

?????文件????????535??2007-09-15?16:09??JCP017.py

?????文件????????410??2007-09-15?16:17??JCP018.py

?????文件????????569??2007-09-15?17:06??JCP019.py

?????文件????????344??2007-09-15?17:11??JCP020.py

?????文件????????418??2007-09-15?17:16??JCP021.py

?????文件????????742??2007-09-15?20:18??JCP022.py

?????文件????????579??2007-09-15?20:25??JCP023.py

?????文件????????565??2007-09-15?20:36??JCP024.py

?????文件????????412??2007-09-15?20:53??JCP025.py

?????文件????????275??2007-09-15?20:58??JCP026.py

?????文件????????329??2007-09-15?21:14??JCP027.py

?????文件????????494??2007-09-15?21:17??JCP028.py

?????文件????????560??2007-09-15?21:26??JCP029.py

?????文件????????340??2007-09-15?21:40??JCP030.py

............此處省略69個文件信息