// Bob Myers
// 
// Simple set of function call examples using the cmath library function
//  sqrt()

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

int main()
{
  double x = 9.0, y = 16.0, z;

  z = sqrt(36.0);	// sqrt returns 6.0 (gets stored in z)
  printf("z = %.1f\n", z);

  z = sqrt(20.0);	// return square root of 20 (gets stored in z)
  printf("z = %.1f\n", z);

  z = sqrt(x);		// sqrt returns 3.0 (gets stored in z)
  printf("z = %.1f\n", z);

  z = sqrt(x + y);	// sqrt returns 5.0 (gets stored in z) 
  printf("z = %.1f\n", z);

  // sqrt returns 10.0, which gets printed
  printf("Square root of 100: %.1f\n", sqrt(100.0) );

  // because of automatic type conversion rules we can send an int where a 
  //  double is expected.  This call returns 7.0
  printf("sqrt(49) returns %.1f\n", sqrt(49) );

  // in this last one, sqrt(625.0) returns 25.0, which gets sent as the
  //  argument to the outer sqrt call.  This one returns 5.0, which gets
  //  printed
  printf("sqrt(sqrt(625.0)) = %.1f\n", sqrt(sqrt(625.0)) );	

  return 0;


}