从0开始计数,而不是1的原因:
数字系统被简化为只有0与1的基本思想,无论0还是1都占据一个位数,都有和它相关的权数。自然,我们就从0开始计数。否则就浪费了一个比特位。
比特(BIT)是binary digit的简写,从0到1的数字,而bi表示2.所以就有两个数字,因此bit诞生了。
ASCII码,可以表示键盘上的字符。
8个bit是一个byte,可以表达256个可能的字符,可以包含整个美...
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编程语言 时间:
2015-08-31 17:22:55
阅读次数:
293
题目连接http://poj.org/problem?id=2046GapDescriptionLet's play a card game called Gap.You have 28 cards labeled with two-digit numbers. The first digit (f...
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其他好文 时间:
2015-08-31 17:10:39
阅读次数:
215
练习:1、显示/etc/passwd文件中以bash结尾的行。cat/etc/passwd|grep‘bash$‘2、显示/etc/passwd文件中的两位数或三位数。cat/etc/passwd|grep‘[[:digit:]]\{2,3}\‘3、显示`netstat-tan`命令结果中以‘LISTEN’后跟0个、1个或者多个空白字符结尾的行。cat/etc/passwd|grep‘LIST..
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系统相关 时间:
2015-08-31 15:23:14
阅读次数:
204
题目:
Given a non-negative integer num, repeatedly add all its digits until the result has only
one digit.
For example:
Given num = 38, the process is like: 3
+ 8 = 11, 1 + 1 = 2. Since 2...
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其他好文 时间:
2015-08-31 15:21:10
阅读次数:
124
Add Digits
Given a non-negative integer num, repeatedly add all its digits until the
result has only one digit.
For example:
Given num = 38, the process is like: 3
+ 8 = 11, 1 + 1 = 2. ...
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其他好文 时间:
2015-08-31 13:36:38
阅读次数:
168
Description:Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n.For example:Given n =...
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其他好文 时间:
2015-08-31 13:28:48
阅读次数:
130
DescriptionLet's play a card game called Gap. You have 28 cards labeled with two-digit numbers. The first digit (from 1 to 4) represents the suit of t...
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其他好文 时间:
2015-08-30 19:28:00
阅读次数:
163
总结本此课程中所涉及命令的使用方法及相关示例展示;总结基本正则表达式及扩展正则表达式显示/etc/passwd文件中以bash结尾的行egrep‘bash$‘/etc/passwd显示/etc/passwd文件中的两位数或三位数egrep‘\<[[:digit:]]{2,3}\>‘/etc/passwd显示netstat-tan命令结果中以’LISTE..
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其他好文 时间:
2015-08-30 17:54:27
阅读次数:
186
Rightmost Digit
Problem Description
Given a positive integer N, you should output the most right digit of N^N.
Input
The input contains several test cases. The first line of the...
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Web程序 时间:
2015-08-30 14:26:03
阅读次数:
145
Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n.
For example:
Given n = 13,
Return 6, because digit 1 occurred in the followin...
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其他好文 时间:
2015-08-29 18:50:54
阅读次数:
247