//	Ex361.cc
//
//	Sec. 3.6.1 of Lecture
//	Math. functions,

#include <iostream.h>
#include <math.h>

main()
{
 double x,y,z;
 
 x = -1;		//   x < 0 !!
 y = sqrt(x);		//   Square root with wrong argument
 
 cout << "x = " << x << " ,  y  = " << y << endl;

			//   Absolut value
 z = fabs(x);
 cout << "x = " << x << " , |x| = " << z << endl;

                        //   Power function
 y = 3.0;		//   try 2.0 , 3.0 and 2.5
 z = pow(x,y);
 cout << "(x,y) = " << x << " , " << y << " , x^y = " << z << endl;
}