How to read multiple text files

I have multiple text files e. g CKLRR12.txt (file attached) having daily rainfall for 365 days and similarly 2013.txt having daily rainfall record for 365 days. I would like to translate information into single file having 2 columns (1st column to represent date, mm/dd/yyyy and 2nd column to represent rainfall. The output file format is shown below Day Rainfall(mm)

1/1/2012  17.8
1/2/2012  16.3
1/3/2012  0
1/4/2012  14.2
1/5/2012  0
1/6/2012  0
1/7/2012  0
1/8/2012  0.1
1/9/2012  0
1/10/2012  0
1/11/2012  0
upto 12/31/2013  0

[Stephen23]

Do not post duplicate questions. Simply give more information in the original question.

http://www.mathworks.com/matlabcentral/answers/246771-reading-multiple-text-files