2进制和（8,10,16进制）互转

随机生成数和按要求定义长度-Problem Descr iption:

　　 In this problem, we require base automatic conversion from binary number to octal,

decimal or hexadecimal number. The binary number must be generated from random

number according to the given number length, for instance,:

Please input the length of binary number: 4



The automatically generated binary number is 1010.



Please indicate which base you would like to convert to: 10



The binary number 1010 has been converted to the decimal number 10.



Oppositely,　　an　octal,　decimal　or　hexadecimal　　number　　can　be　also automatically

converted to a binary number. The octal, decimal or hexadecimal number must be also

generated from random number according to the given number length, for instance,



Please select one of the following bases for automatically generated number:



1. octal

2. decimal

3. hexadecimal



Which one? 3



Please input the length of hexadecimal number: 3



The automatically generated hexadecimal number