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   poly

   Usage
   #include <math.h>
   double poly(double x,int deg,double coeff[]);

   Description
   poly evaluates a polynomial of the form :
   (coeff[deg] * x + coeff [deg-1]) * x +...+ coeff[0].

   Example
   #include <stdio.h>
   #include <math.h>
   double coeff[4];
   main()
   {
   double x = 1.2,y;
        coeff[0] = 0.0;
        coeff[1] = 1.0;
        coeff[2] = 2.0;
        coeff[3] = 3.0;
        y = poly(x,3,coeff);
        printf("The polynomial is %f\n",y);
   }

   Return Value
   The double result is returned.