There are four types of interrupts on the CPU.
? Reset
? Maskable
? Nonmaskable
? Exception(异常也可视为中断)
These first three types are differentiated by their
priorities. The
reset interrupt has t...
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其他好文 时间:
2014-05-22 13:14:59
阅读次数:
245
知识点:
最小公倍数(a,b)=a*b/最大公约数(a,b)
Party
Description
The CEO of ACM (Association of Cryptographic Mavericks) organization has...
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其他好文 时间:
2014-05-22 11:41:33
阅读次数:
354
c语言里所有以#开头的都是预编译指令,就是在正式编译之前,让编译器做一些预处理的工作。
#ifdef DEBUG printf("variable x has value = %d\n",x);
#endif#if和#endif是配对的,叫做条件编译指令,如果满足#if后面的条件,就编译#if和#....
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其他好文 时间:
2014-05-22 04:37:10
阅读次数:
251
lmysql有六处使用了字符集,分别为:client
、connection、database、results、server
、system。?client是客户端使用的字符集。?connection是连接数据库的字符集设置类型,如果程序没有指明连接数据库使用的字符集类型就按照服务器端默认的字符集设...
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数据库 时间:
2014-05-22 02:27:03
阅读次数:
278
题目:We all know that Bin-Laden is a notorious
terrorist, and he has disappeared for a long time. But recently, it is reported
that he hides in Hang Zho...
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其他好文 时间:
2014-05-22 01:09:55
阅读次数:
328
为了测试mysql的索引,要向数据库先插入上万条数据,然后再测试。手动插入太麻烦,写了一段代码。先上代码:package action;import
java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet...
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数据库 时间:
2014-05-21 21:20:16
阅读次数:
374
Description
Facer's pet cat just gave birth to a brood of little cats. Having considered the health of those lovely cats, Facer decides to make the cats to do some exercises. Facer has well designe...
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其他好文 时间:
2014-05-21 10:36:57
阅读次数:
297
Catch That Cow
Problem Description
Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a number li...
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其他好文 时间:
2014-05-21 07:02:40
阅读次数:
312
数据源
从接触DBMS开始就在用数据源(DataSource),它其中很重要的一个作用就是可以管理Connection,管理的方式也就是经常听到的ConnectionPool。它的管理其实就是对DriverManager获取Connection进行了包装。
下面就首先看看用DataSource来取代DriverManager来获取Connection的好处:
一般DataSour...
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其他好文 时间:
2014-05-20 17:03:34
阅读次数:
264
【题目】
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring.
For "(()", the longest valid parentheses substring is "()", which has length = 2.
Another example is ")()())", whe...
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其他好文 时间:
2014-05-20 16:39:07
阅读次数:
280