/*
File name: lab_assignment_6_mattias_herrfurth.c

Author: Mattias Herrfurth

Section: CMPR.271.04

Program intent: The purpose of this program is to split an integer into
it's individual digits and list the number of occurences of each digit
in the integer. The program will also check to see if each digit is
different, as well as check for if the integer is divisible by
each and every digit it contains, as long as the integer does not
contain a zero.

Input data: an integer.

Output data: a table listing the number of occurences of each digit in
the integer, and whether or not the integer is divisible by each of its
digits if the integer does not contain a zero.
*/

/*--------------------
Include section
--------------------*/
#include <stdio.h>
#include <math.h>
int TRUE=1;
int FALSE=0;
/*--------------------
Function prototypes
--------------------*/
void split(long long int n);
void table(int a[],int s);
int diff(int a[],int s);
int div(long long n,int a[],int s);

/*----------main function----------
Purpose: This function will receive an integer input from the user,
check for whether or not it is positive, and call upon the other
functions to perform operations with the inputted integer.
---------------------------------*/
int main()
{
   long long n=1;
   while (n!=0)
   {
      printf("\n\nEnter a positive integer with 10 or less digits, or enter 0 (zero) to terminate the program: ");
      scanf("%lld",&n);
      if (n==0)
      {
         break;
      }
      else if (n>9999999999)
      {
         printf("\nInput must be 10 digits or less");
      }
      else if (n<0)
      {
         printf("\nIncorrect input.");
      }
      else
      {
         split(n);
      }
   }
   printf("Goodbye.\n");
   return 0;
}

//this function will split the integer up into individual digits
void split(long long int n)
{
   int a[10]={0},s=0;
   long long int x=n,d;
   while (x>0)
   {
      d=x%10;
      a[s]=d;
      x=x/10;
      s++;
   }
   /*int g;
   for(g=0;g<10;g++)
   {
      printf("%d ",a[g]);
   }*/
   table(a,s);
   int c=0;
   while (c<s)
   {
      if (a[c]==0)
      {
         printf("\nWrong input for the second part.\nInput should not contain a zero.\n");
         break;
      }
      c++;
   }
   if (diff(a,s)==FALSE)
   {
      printf("\nWrong input for the second part.\nInput should not contain any digit more than once.\n");
   }
   else if (div(n,a,s)==TRUE)
   {
      printf("\n%lld is divisible by its digits.\n",n);
   }
}

/*this function will print a table of the amount of occurences for each
digit in an integer*/
void table(int a[],int s)
{
   printf("Digits:     0   1   2   3   4   5   6   7   8   9\nOccurs:     ");
   int m,dig=0,res;
   while (dig<10)
   {
      res=0;
      for(m=0;m<s;++m)
      {
         if (a[m]==dig)
         {
            res++;
         }
      }
      dig++;
      printf("%d   ",res);
      if (dig==10)
      {
         break;
      }
   }
}

//this function will test the integer for if any of its digits repeat
int diff(int a[],int s)
{
   unsigned int c=0;
   int m;
   while (c<10)
   {
      for(m=0;m<s;m++)
      {
         if(a[c]==a[m] && c!=m)
         {
            return (FALSE);
         }
      }
      c++;
   }
   return (TRUE);
}

//this function tests for if the integer is divisible by each digit
int div(long long n,int a[],int s)
{
   int c;
   for(c=0;c<s;c++)
   {
      if (n%a[c]!=0)
      {
         return (FALSE);
      }
   }
   return (TRUE);
}