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志华 — Sun, 16 Jan 2011 16:00:00 GMT

先脓(chu��ng)一�D�代�?

#include <stdio.h>
#include <cs50.h>
#include <stdlib.h>
#include <string.h>

int
main(int argc, char *argv[])    {
    printf("Input a string:");
    char *text=GetString();

    char *tmp=(char *)malloc(sizeof(char) * strlen(text));
    memcpy(tmp,text,strlen(text));

    printf("%s\n%s\n",text,tmp);
    return 0;
}

再脓(chu��ng)奇怪的现象

zhihua@ThinkPad (~/cs50/2009fall/psets/2): make test
gcc -ggdb -std=c99 -Wall -Werror -Wformat=0 test.c -lcs50 -lm -o test
zhihua@ThinkPad (~/cs50/2009fall/psets/2): ./test
Input a string:HELLO WORLD
HELLO WORLD
HELLO WORLD
zhihua@ThinkPad (~/cs50/2009fall/psets/2): ./test
Input a string:HELLO,WORLD
HELLO,WORLD
HELLO,WORLD
zhihua@ThinkPad (~/cs50/2009fall/psets/2): ./test
Input a string:HELLO, WORLD
HELLO, WORLD
HELLO, WORLDy

很奇怪这�?#8216;y'是怎么出现的呢�Q?
又测了一把，发现只要是输�?2个字�W�长度的时候，�q�个‘y’��׃��出现。请高手相告

志华 2011-01-17 00:00 发表评论

在Ubuntu上设�|�CS50环境

志华 — Fri, 14 Jan 2011 13:48:00 GMT

摘要: 在Ubuntu里设�|�CS50里gcc的环境变�?nbsp; 阅读全文

志华 2011-01-14 21:48 发表评论

取消Ubuntu开��盘

志华 — Thu, 06 Jan 2011 12:39:00 GMT

可能是我开始安装硬盘时分区有问题，现在每次开��旉��会出问题�Q�所以我惌��q�这一步，使开机速度也快炏V�?br>可以修改/etc/fstab文�g�Q�将根目录下的分�?lt;pass>�?修改�?

# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
/dev/sda4       /               ext2    errors=remount-ro 0       0

也可以在�q�个文�g中开机mount分区

志华 2011-01-06 20:39 发表评论

QQ在Ubuntu上崩溃的问题

志华 — Thu, 30 Dec 2010 13:17:00 GMT

当初�q�以为是QQ自��n的问题，其实是QQ配置的问题�?br>

#!/bin/sh
export GDK_NATIVE_WINDOWS=true
cd /usr/share/tencent/qq/
./qq

��d��GDK_NATIVE_WINDOWS环境变量后，QQ��׃��崩溃了�?br>
PS�Q�发现最�q�Google搜烦都有问题了，��来��多的应用不能用�Q�感慨该当如何是好啊�Q?br>

志华 2010-12-30 21:17 发表评论

志华 — Sun, 19 Dec 2010 15:19:00 GMT

摘要: Ubuntu 删除�q�时内核及无用文�?nbsp; 阅读全文

志华 2010-12-19 23:19 发表评论

志华 — Wed, 15 Dec 2010 12:55:00 GMT

摘要: NetworkManger同pppoeconf其冲�H�，看来wicd才是解决之道啊�?nbsp; 阅读全文

志华 2010-12-15 20:55 发表评论

Ubuntu 无线�|�络讄��

志华 — Fri, 10 Dec 2010 14:19:00 GMT

摘要: 菜鸟在ubuntu中无�U�网�l�的讄�� 阅读全文

志华 2010-12-10 22:19 发表评论

gedit中文昄��问题

志华 — Tue, 07 Dec 2010 12:31:00 GMT

打开以前的中文文档，发现一切�ؕ码，做如下处理：

a. 按下 Alt+F2�Q�打开“�q�行应用�E�序”对话框。在文本框中键入“gconf-editor”�Q��ƈ按下回�R键，打开“配置�~�辑�?#8221;�?/span>
b.展开左边的树节点�Q�找�?/apps/gedit-2/preferences/encodings 节点�q�单��d��?/span>
c. 双击双��?auto_detected 键，打开“�~�辑�?#8221;对话框。单��d��表右边的“��d��”按钮�Q�输�?#8220;GB18030”�Q�单�ȝ��定按钮。列表的最底部新增加了一�?#8220;GB18030”。单击选中它，�q�单��d��边的 “向上” 按钮直到 “GB18030” 位于列表的顶部�ؓ止�?/span>

志华 2010-12-07 20:31 发表评论

Starting with Ubuntu 10.10

志华 — Mon, 06 Dec 2010 13:47:00 GMT

For now, I didn't install the Chinese Input software, so using English instead.

It's a fresh system, and it (Ubuntu 10.10) looks great! During my installation, several issues occurred. Keep a note below, hope can help someone else interested in.

-1> Issue One:
When installing the system using USB drive, it had following error and can't log into the install screen:
Unknown Keyword in configuration file.
Boot:

Solution: change U:/syslinux/syslinux.cfg as following:(i.e. delete ui in the file)

Restart and now we can enter into the install menu.

2>Issue Two:
When selecting install item, it has following error:
failed due to unknown user id(0)
can't open /dev/sr0: No medium found.

Solution: this is because my laptop has no floppy drive while the floppy drive is enabled in BIOS. Log into BIOS and disable the floppy drive. then try again.

志华 2010-12-06 21:47 发表评论