/*
** e1.c: sample solutions to questions III and IV in Exam#1
**                  -- written by Jeff Tian, 10/7/99.
*/

#include <stdio.h>
#include "genlib.h"
#include "simpio.h"

#define N 2

void e1q3_2();
void e1q4();
int GetCard();

main()
{
   printf("CSE 1341-801, Exam#1, Question III, Part 2.\n");
   e1q3_2();
   printf("\nCSE 1341-801, Exam#1, Question IV.\n");
   e1q4();
}

/* e1q3_2()           ** Note: you need to debug and correct the program.**
**   A function to calculate averages of N numbers.  
**                  -- written by Jeff Tian, 9/30/99.
**                  -- corrected by Jeff Tian, 10/7/99.
*/

void
e1q3_2()
{
   int i, x; 
   double y=0;

   for (i=1; i<=N; i++)
   {
      printf("Enter number %d of %d numbers: ", i, N);
      x = GetInteger();
      y += (double) x/N;
   }
   printf("The average of these %d number is %g.\n", N, y);
}


/* e1q4() -- a function to calculate averages of N numbers.  */

void
e1q4()
{
   int i, card, strength=0;

   for (i=1; i<=13; i++)
   {
      card = GetCard();
      switch(card)
      {
         case 1: 
            strength += 4;
            break;
         case 11: 
            strength += 1;
            break;
         case 12: 
            strength += 2;
            break;
         case 13: 
            strength += 3;
            break;
      }
   }
   printf("The strength of your hand is %d points.\n", strength);
}


/* GetCard() -- a function to read the next card.  */

int
GetCard()
{
   int card;

   printf("Please enter the next card (1-13):");
   card = GetInteger();
   if (card > 13 || card < 1)
   {
      printf("Invalid input. Card must be between 1 and 13. Try again:");
      card= GetCard();
   }

   return(card);
}