From: "Pohihihi" <pohihihi AT hotmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: help needed
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Message-ID: <busI9.99733$2z1.28005485@twister.socal.rr.com>
Date: Sat, 07 Dec 2002 20:03:19 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

sorry if this is the wrong newsgroup

hey, i don't have much idea about C/C++ programming, i am more into java, i
got this code which was written in borland (atleast i think so) and i am
interested in seeing what it does (but i have an idea about it). i am giving
the whole code below which is creating problem [lost of error all kind of].
please have a look and let me know what is the problem as the files are all
related to borland (if i understand it correctly). i tried to run it on
MS-VC6++ but same story. i wish the coder must have given the compiler name
used. thanks
--
pohihihi
//////////////////////////////////////////////////////
#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>

float LineEq(int a, int b, float t)
{
 return(a+t*(b-a));
}

void DrawKoch(int x1, int y1, int x5, int y5, float alpha, int level)
{
 int x2,y2, x3,y3, x4,y4;
 int xc,yc;
 int xt,yt;
 float factor1, factor2, factor3;

 factor1 = 0.5-alpha/2;
 factor2 = 0.5+alpha/2;
 factor3 = 1.732*alpha;

 x2 = LineEq(x1, x5, factor1);
 y2 = LineEq(y1, y5, factor1);
 x4 = LineEq(x1, x5, factor2);
 y4 = LineEq(y1, y5, factor2);

 xc = LineEq(x1, x5, 0.5);
 yc = LineEq(y1, y5, 0.5);

 xt = (y5-yc)+xc;
 yt = -(x5-xc)+yc;

 x3 = LineEq(xc, xt, factor3);
 y3 = LineEq(yc, yt, factor3);

 if (level==0)
  line(x1,y1,x5,y5);
 else if (level==1)
 {
  line(x1,y1,x2,y2);
  line(x2,y2,x3,y3);
  line(x3,y3,x4,y4);
  line(x4,y4,x5,y5);
 }
 else
 {
  DrawKoch(x1,y1,x2,y2,alpha,level-1);
  DrawKoch(x2,y2,x3,y3,alpha,level-1);
  DrawKoch(x3,y3,x4,y4,alpha,level-1);
  DrawKoch(x4,y4,x5,y5,alpha,level-1);
 }
}

void InitGraph()
{
 int gdriver = DETECT, gmode, errorcode;
 initgraph(&gdriver, &gmode, "");
 errorcode = graphresult();
 if (errorcode != grOk)
 {
  printf("Graphics error: %s\n", grapherrormsg(errorcode));
  printf("Press any key to halt:");
  getch();
  exit(1);
 }
}

void main(int argc, char *argv[])
{
 int xmax, ymax, color;

 if (argc<7)
 {
  printf("Syntax: koch x1 y1 x2 y2 alpha level\n\n");
  exit(1);
 }

 InitGraph();

 setcolor(getmaxcolor());
 DrawKoch(atoi(*(argv+1)),atoi(*(argv+2)),atoi(*(argv+3)),atoi(*(argv+4)),
    atof(*(argv+5)),atoi(*(argv+6)));

 getch();
 closegraph();
}