49 lines
1.4 KiB
C
49 lines
1.4 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: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/11/05 19:07:51 by dgaillet #+# #+# */
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/* Updated: 2025/11/05 20:53:10 by dgaillet ### ########lyon.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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int ft_atoi(const char *nptr)
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{
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int i;
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int res;
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i = 0;
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res = 0;
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if (!nptr[0])
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return (0);
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while ((nptr[i] >= 9 && nptr[i] <= 13) || nptr[i] == ' ')
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i++;
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if (nptr[i] == '-' && ft_isdigit(nptr[i + 1]))
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return (-1 * ft_atoi(&nptr[i] + 1));
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else if (nptr[i] == '+' && ft_isdigit(nptr[i + 1]))
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i++;
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while (ft_isdigit(nptr[i]))
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{
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res = (10 * res) + nptr[i] - 48;
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i++;
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}
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return (res);
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}
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/*
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#include <stdio.h>
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int main(int argc, char **argv)
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{
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if (argc > 1)
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{
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printf("%d\n", ft_atoi(argv[1]));
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printf("%d\n", atoi(argv[1]));
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}
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}
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*/
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