35 lines
1.3 KiB
C
35 lines
1.3 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atoi.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: gtertysh <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2016/10/31 10:27:11 by gtertysh #+# #+# */
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/* Updated: 2016/12/01 19:51:54 by gtertysh ### ########.fr */
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/* */
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/* ************************************************************************** */
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int ft_atoi(const char *str)
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{
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int numb;
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int is_negative;
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numb = 0;
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is_negative = 0;
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while (*str == ' ' || *str == '\n' || *str == '\t' ||
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*str == '\r' || *str == '\f' || *str == '\v')
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str++;
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if (*str == '-' && str++)
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is_negative = 1;
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else if (*str == '+')
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str++;
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while (*str >= '0' && *str <= '9' && *str != '\0')
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{
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numb = numb * 10 + *str - '0';
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str++;
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}
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if (is_negative)
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return (-numb);
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return (numb);
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}
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