extracting_digits_from_a_number.c

/*

    extracting_digits_from_a_number.c



    You can find all my C programs at Dragan Milicev's pastebin:

    https://pastebin.com/u/dmilicev

*/

#include <stdio.h>

// extract digits from number into array digits[]
// returns the number of extracted digits
int extract_digits_from_number( int number, int digits[20] )
{
    int i, j, number_of_digits = 0, mem;

    while( number != 0 )
    {
        digits[number_of_digits++] = number % 10;   // fill array digits[]
        number = number / 10;
    }

    // reverse first number_of_digits elements of array digits[]
    for ( i=0, j=number_of_digits-1; i<number_of_digits/2; i++, j-- )
    {
        mem = digits[i];
        digits[i] = digits[j];
        digits[j] = mem;
    }

    return( number_of_digits );

} // extract_digits_from_number


int main(void)
{
    int number;             // our number
    int digits[10];         // array to store digits of number
    int number_of_digits;
    int i;

    printf("\n Enter number = ");
    scanf("%d",&number);

    number_of_digits = extract_digits_from_number( number, digits );

    printf("\n Digits of number %d are: \n", number );

    for( i=0; i<number_of_digits; i++ )
        printf("\n %d \n", digits[i] );


    return 0;

} // main()