/* 
   Program: sine.c

   Tests using the sine function
   from the math library.
*/

#include <stdio.h>
#include "genlib.h"
#include "simpio.h"

/* This line is needed to use the funcitons
   in the standard math library
*/
#include <math.h>

#define PI 3.14159

main() {
  double angle, radians ;

  printf("Enter angle in degrees: ") ;
  angle = GetReal() ;

  /* Convert angle to radians */
  radians = angle * PI / 180.0 ;
  printf("The sine of %f degrees is %f.\n",
	 angle, sin(radians)) ;
}