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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: vsimeono <vsimeono@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/09/06 12:21:05 by vsimeono #+# #+# */
/* Updated: 2021/10/02 20:34:30 by vsimeono ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *str)
{
int i;
int num;
int sign;
i = 0;
sign = 1;
num = 0;
while ((*(str + i) >= 9 && *(str + i) <= 13) || (*(str + i) == ' '))
{
i++;
}
if (*(str + i) == '-' || *(str + i) == '+')
{
if (*(str + i) == '-')
{
sign = sign * (-1);
}
i++;
}
while ((*(str + i) >= 48 && *(str + i) <= 57))
{
num = (num * 10) + (*(str + i) - '0');
i++;
}
return (num * sign);
}