/* octal.c
 * converts decimal numbers to octal
 * 
 * King Chapter 4, Ex. 4.
 * 
 * By Cory Spitzer
 * March 7th, 2013
 * 
 * 8**5 = 32768
 * 8**4 = 4096
 * 8**3 = 512
 * 8**2 = 64
 */

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

int main(){
    char num_str[8]; 
    char* thing;
    //char other[];

    int number = 0;
    int number_copy;

    int o234 = 02322;      // is this a way to input octal?

    int octal_digits[16];  // each digit is 0 to 7
    int index;

    /*
             addr         value
             ----         -----
    0 - 3    0x00802000    hell        32bits = 4 bytes
    4 - 7    0x00802004    o/0..
             ...
    num_str  0x00803008    0x00802000    address of 0th char
    thing    0x0080300c    .........    random crap for now
    other    0x00803010    .........    ditto
    number   0x00803014    0x00000000   0 as a 32 bit signed int
     */

    thing = num_str + 1;
    strcpy(num_str, "hello");  // put 'hello'

    printf("num_str = '%s'\n", num_str);   // prints 'hello'
    printf("thing = '%s'\n", thing);       // prints 'ello'

    // or char* num_string? I'm not grokking this yet

    //int oct_number = 0;
    //int i; 

    printf("Enter an integer between 0 and 32767 - (8^5 - 1)");
    //fgets(num_string, 8, stdin);
    scanf("%i", &number);    // put an integer in 0x00803014

    number_copy = number;

    index = 0;
    while (number > 0){
      octal_digits[index] = number % 8;
      number >>= 3;          // same as 'number /= 8';
      index++;
    }

    printf(" as octal = ");
    while (index--) printf("%1i", octal_digits[index]);
    printf("\n");
    
    printf(" check : %o \n", number_copy);
    printf(" o234 = %d \n", o234);


    // print as octal
    //for (i = 0; i < 5; i++) {
        // 
    //}
    //oct_number = 
    
    return 0;
}