76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_itoa.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/11/07 13:06:35 by dgaillet #+# #+# */
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/* Updated: 2025/11/07 13:52:20 by dgaillet ### ########lyon.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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size_t malloc_size(int n)
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{
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size_t size;
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size = 0;
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if (n <= 0)
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size++;
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while (n)
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{
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n /= 10;
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size++;
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}
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return (size);
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}
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void insert_char(char *str, unsigned int nbr, int index)
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{
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if (!index)
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return ;
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str[index] = (nbr % 10) + '0';
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insert_char(str, nbr / 10, index - 1);
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}
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char *ft_itoa(int n)
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{
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unsigned int nbr;
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char *str;
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nbr = n;
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if (n < 0)
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nbr = n * -1;
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str = malloc(sizeof(char) * (malloc_size(n) + 1));
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if (!str)
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return (NULL);
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if (nbr == 0)
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str[0] = '0';
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else
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{
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if (n < 0)
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{
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str[0] = '-';
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}
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insert_char(str, nbr, malloc_size(n) - 1);
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}
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str[malloc_size(n)] = '\0';
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return (str);
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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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char *str;
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if (argc > 1)
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{
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str = ft_itoa(atoi(argv[1]));
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printf("%s\n", str);
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free(str);
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}
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}
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