# include <stdio.h>
# include <math.h>

# include "dislin.h"

int main ( int argc, char *argv[] );

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

int main ( int argc, char *argv[] )

/******************************************************************************/
/*
  Purpose:

    MAIN demonstrates the use of the CURVE routine.

  Modified:
 
    01 September 2005
*/
{
# define N 100

  double fpi = 3.1415926 / 180.0; 
  int i;
  double step;
  double x;
  float xray[N];
  float y1ray[N];
  float y2ray[N];

  printf ( "\n" );
  printf ( "DISLIN_EX01:\n" );
  printf ( "  Demonstrate the use of the CURVE routine, for\n" );
  printf ( "  plotting (X,Y) data.\n" );

  step = 360.0 / ( double ) ( N - 1 );

  for ( i = 0; i < N; i++ )
  {
    xray[i] = i * step;
    x = xray[i] * fpi;
    y1ray[i] = sin ( x );
    y2ray[i] = cos ( x );
  }
/*
  Specify the format of the output file.
*/
  metafl ( "PNG" );
/*
  Specify the name of the output graphics file.
*/
  setfil ( "dislin_ex01.png" );

  disini ( );

  pagera ( );
  complx ( );
  axspos ( 450, 1800 );
  axslen ( 2200, 1200 );

  name ( "X-axis", "x" );
  name ( "Y-axis", "y" );

  labdig ( -1, "x" );
  ticks ( 10, "xy" );

  titlin ( "Demonstration of CURVE", 1 );
  titlin ( "SIN(X), COS(X)", 3 );

  graf ( 0.0, 360.0, 0.0, 90.0, -1.0, 1.0, -1.0, 0.5 );
  title ( );

  color ( "red" );
  curve ( xray, y1ray, N );

  color ( "green" );
  curve ( xray, y2ray, N );

  color ( "fore" );
  dash ( );
  xaxgit ( );

  disfin ( );

  printf ( "\n" );
  printf ( "DISLIN_EX01:\n" );
  printf ( "  Normal end of execution.\n" );

  return 0;
}