ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: thuy-ngu <thuy-ngu@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/10/02 21:22:25 by thuy-ngu          #+#    #+#             */
/*   Updated: 2023/10/21 00:18:41 by thuy-ngu         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_atoi(const char *str)
{
	int	i;
	int	value;
	int	sign;

	i = 0;
	value = 0;
	sign = 1;
	if (str[i] != '\0')
	{
		while ((str[i] >= '\t' && str[i] <= '\r') || str[i] == ' ')
			i++;
		if (str[i] == '-' || str[i] == '+')
		{
			if (str[i] == '-')
				sign = sign * -1;
			i++;
		}
		while (str[i] >= '0' && str[i] <= '9')
		{
			value = value * 10 + (str[i] - 48);
			i++;
		}
	}
	return (value * sign);
}
/*int main(void)
{
	printf("%d", ft_atoi(" 	  +1234ab567"));
	printf("%d", ft_atoi(" 	  -1234ab567"));
}*/