null
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_strtod.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: yantoine <yantoine@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/10/27 16:49:09 by yantoine #+# #+# */
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/* Updated: 2024/11/13 23:04:59 by yantoine ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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static int partie_entiere(double *entier, char *string, int i, double *sign)
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{
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if (string[i] == '-')
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{
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*sign = -1;
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i++;
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}
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while (string[i] && ft_isdigit(string[i]))
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{
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*entier = *entier * 10 + (string[i] - '0');
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i++;
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}
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return (i);
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}
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//fonction qui convertie une string en double
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double ft_strtod(char *string)
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{
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double entier;
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double decimal;
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double diviseur;
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double sign;
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int i;
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i = 0;
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entier = 0;
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decimal = 0;
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diviseur = 1;
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sign = 1;
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i = partie_entiere(&entier, string, i, &sign);
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if (string[i] == '.')
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{
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i++;
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while (string[i] && ft_isdigit(string[i]))
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{
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decimal = decimal * 10 + (string[i] - '0');
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diviseur *= 10;
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i++;
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}
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}
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return ((entier + decimal / diviseur) * sign);
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}
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