Microsoft KB Archive/104776
Article ID: 104776
Article Last Modified on 10/2/2003
- Microsoft FORTRAN PowerStation 1.0 Standard Edition
- Microsoft Fortran PowerStation 1.0a for MS-DOS
This article was previously published under Q104776
A program may execute in an infinite loop if it was compiled with full optimization (-Ox) and contains a do loop calling some of the graphics routines [such as POLYGON_W()].
Some of the graphics functions (such as POLYGON_W) prevent optimized code from recognizing the end condition for the loop.
Microsoft has confirmed this to be a problem in FORTRAN PowerStation for MS-DOS, version 1.0 and 1.0a.
This problems does not apply to FORTRAN PowerStation 32.
Compile the program with no optimization (this is the default).
c Compile options needed: -Ox c The following program will output in an infinite loop: include 'fgraph.fi' include 'fgraph.fd' INTEGER*2 status, npts RECORD / wxycoord / wxyarr(3) status = setvideomode(18) do it=1,2 write (*,'(i4\)') it wxyarr(1).wx = 43.d0 wxyarr(1).wy = 85.d0 wxyarr(2).wx = 50.d0 wxyarr(2).wy = 71.d0 wxyarr(3).wx = 45.d0 wxyarr(3).wy = 85.d0 npts = 3 status = POLYGON_W($GBORDER, wxyarr, npts) enddo END
Additional query words: nofpsnt 1.00