How do I access reference text file? Low Level I/O

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Kratos
Kratos 2015-2-24
评论： Kratos 2015-2-24
Hello, I am trying to do this "The reference filenames will always be formatted as ‘<input1>_#.txt’. For example, if the first input of the function were ‘hpLastPage’ and the current cipher line were 3-23-8-4, you would be looking in the file called ‘hpLastPage_3.txt’."
fh2 = fopen('cipher_1.txt')
line2 = fgetl(fh2);
Line2 = 1-21-9-1;
[a line2] = strtok(line2, '-');
a = 1
line2 = -21-9-1
[fileName, ~] = strtok('hpLastPage')
tiger = [fileName, '_kat.txt'];
This is what I did and for tiger I got
tiger = 'hpLastPage_a.txt'
How do I get hpLastPage_1.txt rather than hpLastPage_a.txt.
Thank you.

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per isakson
per isakson 2015-2-24
See How can I process a sequence of files? Note:
matFileName = sprintf('mat%d.mat', k);
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