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POWhy doesn't this fortran code work?
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  1. POWhy doesn't this fortran code work?
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    copied!<p>Hey, I wrote this (fortran) with the aim of finding the minimum spanning tree of a bunch of points (<em>syscount</em> of them). I know for a fact that this approach works, since i wrote it in javascript earlier today. js is slow though, and i wanted to see how much faster fortran would be!! only problem is it's not working, i'm getting an annoying error;</p> <blockquote> <p>prims.f95:72.43:</p> <p>if((check == 1) .and. (path(nodesin(j))(k) &lt; minpath)) then</p> <pre><code> 1 </code></pre> <p>Error: Expected a right parenthesis in expression at (1)</p> </blockquote> <p>What the hell is that about?! the 43rd character on the line is the "h" of "path"</p> <pre><code>nodesin(1) = 1 do i = 1,syscount-1 pathstart = -1 pathend = -1 minpath = 2000 do j = 1,i do k = 1, syscount check = 1 do l = 1, i if(nodesin(l) == k) then check = 0 end if end do if((check == 1) .and. (path(nodesin(j))(k) &lt; minpath)) then minpath = path(nodesin(j))(k) pathstart = nodesin(j) pathend = k end if end do end do nodesin(i+1) = pathend minpaths(i)(1) = pathstart minpaths(i)(2) = pathend end do </code></pre> <p>Also, i'm fairly new to fortran, so i have a few other questions;</p> <p>can i use &amp;&amp; instead of .and. ?</p> <p>is there a versions of the for(object in list){} loop found in many other languages?</p> <p>is there a verion of the php function in_array ? i.e. bool in_array(needle,haystack), and if there is, is there a better way of doing it than:</p> <pre><code>check = false Asize = size(array) do i = 1, Asize if(array(i) == needle) then check = true end if end do </code></pre> <p>then to using the check variable to see if it's there?</p> <p>(I haven't posted anything on stackoverflow before. please don't get angry if i've broken loads of etiquette things!)</p>
 

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