day1：Markdown基础知识（优缺点、链接、强调、标记代码块、图片）

Markdown基础知识

1. Markdown的优点

1、专注文字内容
2、可导出多格式：HTML、PDF、.md文件
3、纯文本内容，兼容所有的文本编辑器与字处理软件
4、简洁、高效，易读易写

2. Markdown链接

行内式链接：
输入：This is an example inline link.
效果：This is an example .
html:

This is an example inline link.

输入：This is has no title attribute.
效果：This is has no title attribute.
html:

This link has no title attribute.

参考式链接
输入：This is [an example][id] reference-style link.
输入：This is [an example] [id] reference-style link.
空格+[id]
[id]: http://www.baidu.com/ "optional Title Here"
[id]: http://www.baidu.com/ 'optional Title Here'
[id]: http://www.baidu.com/ (optional Title Here)
[id]: http://example.com/ "Optional Title Here"
[id]: http://example.com/longish/path/to/resource/here
"Optional Title Here"
效果：This is **an example ** reference-style link.

输入：baidu

输入1：
I get 10 times more traffic from Google 1 than from
Yahoo 2 or MSN 3.

输入2
I get 10 times more traffic from Google than from
Yahoo or MSN.

HTML：

I get 10 times more traffic from Google than from Yahoo or MSN.

参考式链接字符更少，阅读效果更好。

3. Markdown 强调

输入：bai du
输入：bai du bai
效果：倾斜

输入：bai du
输入：bai du bai
效果：加粗

html
single asterisks
single underscores
double asterisks
double underscores

文字前后加入普通*和_，可用反斜线

输入：*bai du bai du*
效果：bai du bai du

4. 标记代码
   输入：Use the printf() funtion.
   效果：Use the <printf()> funtion.
   html:

   Use the printf() function.

输入：There is a literal backtick(`) here.
效果：There is a literal backtick() here. html: <p><code>There is a literal backtick () here.

输入：
A single backtick in a code span: `
A backtick-delimited string in a code span: `foo`
效果：
A single backtick in a code span: A backtick-delimited string in a code span:foo`
html:

A single backtick in a code span: `

A backtick-delimited string in a code span: `foo`

输入：Please don't use any <blink> tags.
效果：Please don't use any tags.
html：

Please don't use any <blink> tags.

输入：— is the decimal-encoded equivalent of —.
效果：— is the decimal-encoded equivalent of —.
html:

— is the decimal-encoded equivalent of —.

5. 图片
   
   
   ![Alt text][id]
   [id]:url/to/imge "Optional title attribute"