Print an Integer (100-atoi.c)

#include "main.h"

/**
 * _atoi - converts a string to an integer
 * @s: string to be converted
 *
 * Return: the int converted from the string
 */
int _atoi(char *s)
{
    int i, d, n, len, f, digit;

    i = 0; /* an integer to help us iterate in our loop from 0 to len*/
    d = 0; /* checks signage */
    n = 0; /* value of our integer which we keep modifiying char by char, also keeps tracks of the powers of 10, 10th, 100th, 1000th */
    len = 0; /* length of our string */
    f = 0;
    digit = 0;

    while (s[len] != '\0') /* while loop to determine length of our string */
        len++;

    while (i < len && f == 0)
    {
        printf("\n\n*Value of i is %d*\n\n", i);
        printf("\n\n*Value of f is %d*\n\n", f);

        if (s[i] == '-')
        {
            printf("\n\n*Value of s[i] is %c*\n\n", s[i]);
            ++d;
            printf("\n\n*Value of d incremented by 1, d is now %d*\n\n", d);
        }
        if (s[i] >= '0' && s[i] <= '9')
        {
            printf("\n\n*Value of s[i] is %c*\n\n", s[i]);
            digit = s[i] - '0'; /* the digit at this point is being refered to by it's ascii number (48 - 57), subtracting '0' gives us the actual integer, for example, 9 will be represented as 57, and '0' is 48, thus 57 - 48 will result in the decimal 9 */
            printf("\n\n*digit is (s[i] - '0') = %d*\n\n", digit);
            if (d % 2)
            {
                printf("\n\n*Value of d is %d*\n\n", d);
                digit = -digit;
                printf("\n\n*Signage of digit is changed, value of digit is %d*\n\n", digit);
            }
            n = n * 10 + digit;
            printf("\n\n*Value of n is (n * 10 + digit) = %d*\n\n", n);
            f = 1;
            printf("\n\n*Value of f is set to %d*\n\n", f);
            if (s[i + 1] < '0' || s[i + 1] > '9')
            {
                printf("\n\n*If next character (s[%d]is not an integer (not a sign - +), break out of the while loop *\n\n", s[i + 1]);
                break;
            }
            f = 0;
            printf("\n\n*Value of f is set to %d*\n\n", f);
        }
        i++;
        printf("\n\n*Value of i incremented by 1, i is now %d*\n\n", i);
    }

    if (f == 0)
    {
        printf("\n\n*If there are no numbers in the string and f == %d*\n\n", f);
        return (0);
    }
    printf("\n\n*The integer in string %s is %d*\n\n", s, n);
    return (n);
}