ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: juhtoo-h <juhtoo-h@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/08/27 08:27:01 by juhtoo-h          #+#    #+#             */
/*   Updated: 2024/08/30 09:38:21 by juhtoo-h         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_atoi(const char *nptr)
{
	int	i;
	int	sign;
	int	res;

	i = 0;
	sign = 1;
	res = 0;
	while (nptr[i] == ' ' || (nptr[i] >= 7 && nptr[i] <= 13))
		i++;
	if (nptr[i] == '-' || nptr[i] == '+')
	{
		if (nptr[i] == '-')
			sign *= -1;
		i++;
	}
	while (nptr[i] >= '0' && nptr[i] <= '9')
	{
		res = res * 10 + (nptr[i] - '0');
		i++;
	}
	return (sign * res);
}

// #include "stdio.h"
// #include "string.h"

// int main(void)
// {
// 	char	a[20] = "214748364asdfc";
// 	printf("%d\n", atoi(a));
// 	printf("%d\n", ft_atoi(a));
// }