How to run an .exe file by one command?

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Ivan Mich
Ivan Mich 2020-5-6
评论： Walter Roberson 2020-5-15
Hello,
I have a question about a code. I would like to ask a question. I would like to run an .exe file via matlab. My .exe first of all requires an input file in order to run. For this purpose I use the command:
status = system('file.exe input.txt')
Secondly, after putting this command, the .exe file requires to type a specific number in order to run. I would like to avoid typing by hand this number and taking it from an another .txt file .
Could anyone help me?
  2 个评论
Rik
Rik 2020-5-6
If you don't want to type it manually, you need to make sure you can enter it through the command line itself. Note that using a batch file to do this is also an option, if you can't get everything on a single line of code.
Mario Malic
Mario Malic 2020-5-6
Could you refer to the .exe program you are calling if there's an option to add it as a parameter?
Example:
status = system('file.exe input.txt' -p 1)

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回答（1 个）

Ameer Hamza
Ameer Hamza 2020-5-6
You can use input redirection to type the input from a txt file. Something like this
status = system('file.exe input.txt < number.txt')
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Ameer Hamza
Ameer Hamza 2020-5-15
You can get away with few lines in Walter's code if you know that there will be no issue with reading and writing to a file.
if fidin < 0; error('failed to open "%s" for reading', datafile); end
and other such lines. Apart from that, any further attempt to make code compact will usually make the logic more complicated.
Walter Roberson
Walter Roberson 2020-5-15
The above is the simplest way to do what you ask: it uses only basic I/O operations. But simplest is not the same as shortest.
datafile = 'data.txt'; %read from it
inputfile = 'input_2.txt'; %read from it
newinputfile = 'input.txt'; %write to it
lines = regexp(fileread(inputfile), '\r?\n','split');
number5 = textscan(fileread(datafile),'%*s%*s%*s%*s%s', 1, 'headerlines', 1);
lines(7) = number5{1};
fid = fopen(newinputfile,'wt'); fprintf(fid, '%s\n', lines{:}); fclose(fid);
status = sytem( sprintf('file.exe < "%s"', newinputfile) );
To understand this you have to understand something about the text processing utility regexp(), and several of the less-common details about textscan(), and understand how cell expansion interacts with fprintf()

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