//JS pseudo TurboPascal simulator script
//program gauss; {Lutz Tautenhahn (c) 1992)}
var form=80;
var graphdriver,graphmode;
var nn;
var y=[];
var z,r,fi,x;
var zahl;
var xi,yi,i,mx,my;
var s;

function normalrandom()
{ var zz=1-Math.random();
  return(Math.sqrt(Math.log(1/(zz*zz)))*Math.cos(2*Math.PI*Math.random()));
}

function run()
{ if (nreadln<1)
  { nn=0;
    initgraph();
    mx=getmaxx;
    my=getmaxy;
    for (i=1; i<=mx; i++) putpixel (i,my,8);
    for (i=1; i<=my; i++) putpixel (320,i,8);
    for (i=1; i<=650; i++) y[i]=1;
    do 
    { nn=nn+1;
      x=normalrandom();
      xi=Math.round(form*x)+320;
      if ((1<=xi)&&(xi<=mx))
      { y[xi]=y[xi]+1;
        yi=my-y[xi];
        putpixel(xi,yi,15);
      }
    }
    while(nn<68315);
    readln(''); return;
  }
  if (nreadln<2)
  { for (i=1; i<=mx; i++) putpixel (i,my,8);        
    for (i=1; i<=my; i++) putpixel (320,i,8);
    settextstyle(1,'horizdir',2);
    settextjustify('left','top');
    outtextxy(10,10,nn);
    settextstyle(4,'horizdir',10);
    settextjustify('center','top');
    outtextxy(320,20,'Gauss');
    for (i=1; i<=mx; i++) putpixel(i,my-y[i],15);
    readln('');
    return;
  }  
  closegraph();
  exit();
}