Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: Joshua Meeds <dreamer@sinclair.net>
Newsgroups: scee.yaroze.programming.gnu_compiler
Subject: printf works, code doesn't
Date: Mon, 13 Apr 1998 20:15:07 -0700
Organization: SCEA News Server
Lines: 31
Message-ID: <3532D4BA.49B30CA9@sinclair.net>
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I have an oddity:  I am trying to find the slope of a line - the
equation for this is (Y2-Y1)/(X2-X1).  In my code, I made a function
"Slope", as follows:

double Slope(int a,int b)
{
  u_long X1,Y1,X2,Y2;
  double Fun;

  X1=Dude[a].position.vx;
  Y1=Dude[a].position.vz;
  X2=Dude[b].position.vx;
  Y2=Dude[b].position.vz;
  printf2("\n%d / %d = %e -- ",Y2-Y1,X2-X1, (Y2-Y1) / (X2-X1)); 
//printf2 = printf that supports %e   Fun=((Y2-Y1) / (X2-X1));
  printf("%e",Fun);

  return (Fun);  // Used to be return ((Y2-Y1) / (X2-X1));  - Same thing
happened
}

The weird and annoying thing is that the printf2 shows the correct
slope,
while Fun doesn't.  Fun=0.  Does anyone have ANY idea why this is
happening?
Or an easier way to find the slope of a line?

Thanks,
                - Dreamwriter Dragon
                  dreamer@sinclair.net
                        -==UDIC==-