lab 4

1.連結一
http://s9826145.blogspot.com/2011/02/blog-post.html?showComment=1298291246498#c9099160890745635145
2.連結二

http://s9726252.blogspot.com/2011/02/1.html?showComment=1298291962607#c1231915699385685041

3.連結三
http://s9726324.blogspot.com/2011/02/hw1.html?showComment=1298292491028#c3316890536626645072

4.連結四
http://s9726305.blogspot.com/2011/02/homework-1.html?showComment=1298292791055#c8109474663566112111

5.連結五
http://s9726223.blogspot.com/2011/02/homework1.html?showComment=1298293143835#c8010299473185982335