#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAC 50
#define MAX 10

char * chdectoasc(int dec);

int main(void)
{
  int k, loc;
  char str[MAC];  // in your lab, the room names are in the 2-D string array
  char *tocat = NULL;  

  strcpy(str, "A sales room"); // Use the values in your sales room name array

  //puts(str);  //error check for debug
  //loc = strlen(str);  //error check
  //printf("\nloc is %d before\n",loc); //error check for debug
  
  //Get the sales room number (in this sample, the user gives the number).  In your lab,
  //the sales room number is one of the array indicies

  printf("Please enter a positive integer: ");
  scanf("%d", &k);

  //Call chdectoasc to make a char string that contains the number k

  tocat = chdectoasc(k);
  printf("\ntocat is %s\n",tocat); //error checking for debug

  //Concatenate a blank and the number string on the end of the sales room name

  strcat(str, " ");
  strcat(str, tocat);

  printf("\nstr is **%s**\n",str); // error checking for debug

  loc = strlen(str);  // Find the length of the new string-with-number

  printf("\nloc is %d after and char at loc is %c\n",loc,str[loc-1]);  //error check for debug

  //Use atoi if you need to get the number back out of the string
  //The number will always be at the end of the string so 
  //str (start of string) + loc (count of chars in string) - 1 (index starts at 0)

  printf("\nNumber of the room is %d\n",atoi(str+loc-1)); //example use of atoi

  return 0;
}

/******
function chdectoasc :
CHange DECimal TO ASCii

char * chdectoasc(int dec)

Input:  int dec - Takes in a positive integer <but no error checking is currently implemented>
Output: char * - Returns the address of a string that contains the ASCII representation of that number
******/


char * chdectoasc(int dec)
{
  // ASCII table values to print the 10 digits are 48 chars away from the digit itself

  char *temp;
  int tens = 0, i, dtemp, ltr;
  //  printf("dec is %d\n",dec);  //error checking

  dtemp = dec;

  //Count the number of digits in dtemp
  while (dtemp > 9)
    {
      dtemp = dtemp / 10.0;
      //  printf("dtemp is %d\n",dtemp);  //error checking
      tens++;
    }

  dtemp = dec;
  //Allocate a string big enough to hold all the digits and an end of string marker
  temp = (char *)malloc(sizeof(char)*(tens+2));


  //Loop through the digits, take a remainder put its ASCII rep in string, divide it out of dtemp
  for (i=0; i<= tens; i++)
    {

      ltr = dtemp % 10;
      dtemp = dtemp / 10.0;
      temp[tens-i] = (char) (ltr +48);

    }

  //Put in end of string marker
  temp[tens+1] = '\0';
  //  printf(temp);  //use for error checking
  return temp;
}