/* ***********************************
This is the function square() with a
driver routine to test it.

G.C. Rutledge
October 2002
*********************************  */

#include <stdio.h>
double square(double);

int main(void)
{
  double z;

  printf("input a value of z to test:\n");
  scanf("%lf",&z);

  printf("the value of z^2 is %f\n",square(z));

  return (0);
}

/* **********************************
this is the function square()
It returns the value of a*a

G.C. Rutledge
October 2002
********************************** */
double square(double a)
{
  return a*a;
}