/* File: math.c

   Use of some functions in the math library.
   Compile using: gcc -Wall math.c -lm
*/

#include <stdio.h>

// Must have the following line
#include <math.h>

// A constant
#define PI 3.1415927

int main() {
   double x, y ;
   double z ;

   printf("x = ") ;       // prompt for x
   scanf("%lf", &x) ;

   printf("y = "  ) ;     // promput for y
   scanf("%lf", &y) ;

   // Compute some values using x & y

   z = sqrt(x) ;
   printf("The square root of %f is %f\n", x, z) ;

   printf("x^y = %f\n", pow(x,y)) ;

   printf("sin( %f * PI ) = %f\n", y, sin(PI*y) ) ;

   return 0 ;
}