printing out each digit of number (in order)

// Program to print digits of number
#include <stdio.h>
#include <stdbool.h>

int main ()
{
    int number, right_digit;

    printf ("Enter your number.\n");
    scanf ("%i", &number);

    bool isNegative = number < 0 ? true : false;
    number = isNegative ? -number : number;

    isNegative ? printf("negative ") : printf("");

    do{
        int copy = number;
        int places = 1;
        while (copy > 10){
            copy /= 10;
            places *= 10;
        }

        switch(copy){
            case 10:
                printf("one zero");
                break;
            case 0:
                printf("zero");
                break;
            case 1:
                printf("one");
                break;
            case 2:
                printf("two");
                break;
            case 3:
                printf("three");
                break;
            case 4:
                printf("four");
                break;
            case 5:
                printf("five");
                break;
            case 6:
                printf("six");
                break;
            case 7:
                printf("seven");
                break;
            case 8:
                printf("eight");
                break;
            case 9:
                printf("nine");
                break;
        }
        printf(" ");

        number -= places * copy;

    }while (number != 0);


    return 0;
}