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
In the previous section we saw how to use
vectors to solve geometry problems. Now we are going to learn how to use some
basic linear algebra to do lin...
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其他好文 时间：
2014-05-22 04:17:01
阅读次数：
549
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
Given a sorted array, remove the duplicates in
place such that each element appear onlyonceand return the new length.Do not
allocate extra space for a...
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其他好文 时间：
2014-05-21 20:00:51
阅读次数：
296
Big Event in HDU
Problem Description
Nowadays, we all know that Computer College is the biggest department in HDU. But, maybe you don't know that Computer College had ever been split into Comp...
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其他好文 时间：
2014-05-21 10:51:55
阅读次数：
300
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
Piggy-Bank
Problem Description
Before ACM can do anything, a budget must be prepared and the necessary financial support obtained. The main income for this action comes from Irreversibly Bound M...
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其他好文 时间：
2014-05-21 10:17:35
阅读次数：
289
Balance
Time Limit: 1000MS
Memory Limit: 30000K
Total Submissions: 10065
Accepted: 6231
Description
Gigel has a strange "balance" and he wants to poise it. Actually...
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其他好文 时间：
2014-05-21 07:23:20
阅读次数：
312
Reverse a linked list from position m to n. Do it in-place and in one-pass.
For example:
Given 1->2->3->4->5->NULL, m = 2 and n =
4,
return 1->4->3->2->5->NULL.
Note:
Given m, n satisfy the fol...
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其他好文 时间：
2014-05-21 07:18:02
阅读次数：
301
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
