Unexpected output while calling octave script from php

Question

I am calling Octave script from PHP and passing parameters to it. But I get the unexpected output.

The PHP code I'm using to pass arguments and call the Octave script is:

$a=8;
$b=3;
$cmd = "C:\Octave\Octave4\bin\octave-cli C:\wamp\www\dspace\add.m $a $b";
$ex = passthru($cmd, $op);
var_dump($ex);

My Octave script:

arglist = argv();
 a = arglist{1};
 b = arglist{2};

function f (a,b)
  a + b
endfunction

printf(f(a,b));

The output get is:

ans = 107

Expected output is:

How can I fix this?

What version of Octave are you using? Are you calling the script on Windows? — James
– James, Commented Apr 29, 2016 at 9:28

Andy · Accepted Answer · 2016-05-02 07:29:19Z

3

You are adding the ASCII codes for the character "8" which is 56 and "3" which is 51 so the result is 107. Convert the strings to numbers:

arglist = argv();

a = str2num (arglist{1});
b = str2num (arglist{2});

function ret = f (a,b)
  ret = a + b;
endfunction

printf("%i", f(a,b));

answered Apr 29, 2016 at 9:52

Andy

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