/*----------------------------------------------------------------*/
/*  Program chapter7_4                                            */
/*                                                                */
/*  This program stores fingerprint information in a structure.   */
/*  It then references a function to compute the overall category.*/

#include <stdio.h>

/*  Define a structure for the fingerprint information.        */
/*  The order for fingertips is right hand, thumb to pinky,    */
/*  and left hand, thumb to pinky. The codes are L for loops,  */
/*  W for whorls, and A for arches.                            */

struct fingerprint
{
   int ID_number;
   double overall_category;
   char fingertip[10];
};

int main(void)
{
   /*  Declare and initialize variables.  */
   struct fingerprint new_print;
   double compute_category(struct fingerprint f);

   /*  Specify information for the new fingerprint.  */
   new_print.ID_number = 2491009;
   new_print.overall_category = 0;
   new_print.fingertip[0] = 'W';
   new_print.fingertip[1] = 'L';
   new_print.fingertip[2] = 'L';
   new_print.fingertip[3] = 'W';
   new_print.fingertip[4] = 'A';
   new_print.fingertip[5] = 'L';
   new_print.fingertip[6] = 'L';
   new_print.fingertip[7] = 'W';
   new_print.fingertip[8] = 'A';
   new_print.fingertip[9] = 'L';

   /*  Reference function to compute overall category.  */
   new_print.overall_category = compute_category(new_print);

   /*  Print overall category computed by the function.  */
   printf("Fingerprint Analysis for ID: %i \n",
          new_print.ID_number);
   printf("Overall Category: %.2f \n",new_print.overall_category);

   /*  Exit program.  */
   return 0;
}
/*--------------------------------------------------------------*/
/*  This function computes the overall category                 */
/*  for a fingerprint.                                          */

double compute_category(struct fingerprint f)
{
   /*  Declare and initialize variables.  */
   double Rt=0, Ri=0, Rm=0, Rr=0, Rp=0, Lt=0, Li=0, Lm=0, Lr=0,
          Lp=0, num, den;

   /* Set values based on whorls. */
   if (f.fingertip[0] == 'W')
       Rt = 16;
   if (f.fingertip[1] == 'W')
       Ri = 16;
   if (f.fingertip[2] == 'W')
       Rm = 8;
   if (f.fingertip[3] == 'W')
       Rr = 8;
   if (f.fingertip[4] == 'W')
       Rp = 4;
   if (f.fingertip[5] == 'W')
       Lt = 4;
   if (f.fingertip[6] == 'W')
       Li = 2;
   if (f.fingertip[7] == 'W')
      Lm = 2;

   /*  Compute the numerator and denominator for overall category.  */
   num = Ri + Rr + Lt + Lm + Lp + 1;
   den = Rt + Rm + Rp + Li + Lr + 1;

   return num/den;
}
/*------------------------------------------------------------------*/