Project 1

This project tests your ability to write regular expressions and use them in Perl scripts. Please write the following:

a regular expression that matches a floating point number. For example, it should match -12.5, +10, 0.12, -.10, etc, but it should not match 10.2.1 or .2.
a regular expression that matches a string containing a Windows 2000 file name. Let's assume that a file (or a folder) name can contain up to 256 characters that include any letters, digits, space symbols, tilde symbos, carrots, dashes, underscore symbols, and dollar signs. Any folder or file can have a number of extensions that separated from the file/folder name or previous extension with a backslash symbol. For example, it should match
```
C:\Documents and Settings\hidden.user\Application Data\desktop.ini
```
but it should not match
```
h:\.access.ini
```
because a file name cannot be empty.
a regular expression that matches an HTML opening tag, all its attributes, the corresponding closing tag, and the text between the opening and closing tags. For example, for the following string
```
<div align=center width=90%>This is <i>italic</i> text</div>
```
your script should print:
```
Tag name: div
Attribute: align  value: center
Attribute: width  value: 90%
Text: This is <i>italic</i> text
```

For each regular expression write a script that tests a string $str defined in it for a match.

This project is due by 11:59pm on Tuesday, February 3, 2004.