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ft_atoi.c
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ft_atoi.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mosborne <mosborne@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2017/09/21 16:26:58 by mosborne #+# #+# */
/* Updated: 2017/10/05 18:36:23 by mosborne ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *str)
{
int i;
int sign;
int num;
i = 0;
sign = 1;
num = 0;
while ((str[i] == ' ') || (str[i] == '\t') || (str[i] == '\n') ||
(str[i] == '\v') || (str[i] == '\f') || (str[i] == '\r'))
i++;
if (str[i] == 45 && sign != -1)
{
sign = -1;
i++;
}
else if (str[i] == 43)
i++;
while (str[i] >= '0' && str[i] <= '9')
{
num = num * 10 + (str[i] - 48);
i++;
}
return (num * sign);
}