int main()
{
 printf("Hello,World!\n");
}

/*****************************************************

 This example shows how to use comments


******************************************************/

int main(){   /* main program always starts this way */
  MakeView(200,80);  // make a view of size 200x80
  SetColor(100,0,0);  // set drawing color to 100 % red
  MoveTo(20,50);  // move pen to drawing position
  FontInfo(22,0,0); // the first argument must be 12, 16 or 22
  DrawString("Hello, World!"); // draw string at the current pen position
  GifOut(); // output the buffered drawing to GIF format data
} /* main program always ends this way */

/*****************************************************

 Roots of Quadratic Equation
 (x-2)(x-1)=0

******************************************************/

int main()
{
 double a,b,c,d;

 a=1.;
 b=-3.;
 c=2.;
 d=(-b+sqrt(b*b-4.*a*c))/(2.*a);
 printf("d=%8.4f\n",d);
 d=(-b-sqrt(b*b-4.*a*c))/(2.*a);
 printf("d=%8.4f\n",d);
}

/*****************************************************

 Trigonometric Functions

******************************************************/

int main()
{
 int i;
 double a[11];
 double pi2;

 for(i=0;i<11;i=i+1) a[i]=0.1*i; // i++ style not supported
 pi2=3.1415926536/2.;

 for(i=0;i<11;i=i+1){
  printf("%5i  %5.3f  %12.8e\n",i,a[i],sin(pi2*a[i]));
 }
}