ft_itoa

ft_itoa.c

@@ -0,0 +1,71 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_itoa.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: ctherin <ctherin@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2022/05/09 16:58:14 by ctherin           #+#    #+#             */
+/*   Updated: 2022/05/09 17:22:48 by ctherin          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include"libft.h"
+
+int	get_nb_len(int n)
+{
+	long	nl;
+	int		len;
+	int		is_neg;
+
+	nl = n;
+	len = 0;
+	is_neg = 0;
+	if (nl == 0)
+		return (1);
+	if (nl < 0)
+	{
+		nl = -nl;
+		is_neg = 1;
+	}
+	while (nl > 0)
+	{
+		len++;
+		nl /= 10;
+	}
+	return (len + is_neg);
+}
+
+char	*ft_itoa(int n)
+{
+	char	*ptr;
+	int		nb_len;
+	long	nl;
+
+	nb_len = get_nb_len(n);
+	nl = n;
+	ptr = ft_calloc(nb_len, sizeof(char));
+	if (!ptr)
+		return (NULL);
+	if (nl < 0)
+	{
+		nl = -nl;
+		ptr[0] = '-';
+	}
+	if (nl == 0)
+		ptr[0] = '0';
+	while (nl > 0)
+	{
+		ptr[nb_len - 1] = (nl % 10) + '0';
+		nl /= 10;
+		nb_len--;
+	}
+	return (ptr);
+}
+
+/*#include<stdio.h>
+int	main()
+{
+	printf("%s", ft_itoa(12));
+	return (0);
+}*/

libft.h

@@ -6,7 +6,7 @@
 /*   By: ctherin <ctherin@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2022/05/02 17:49:13 by ctherin           #+#    #+#             */
-/*   Updated: 2022/05/09 15:54:22 by ctherin          ###   ########.fr       */
+/*   Updated: 2022/05/09 17:21:37 by ctherin          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -43,5 +43,6 @@ void	*ft_strrchr(const void *s, int c);
 int		ft_atoi(const char *nptr);
 char	*ft_strjoin(char const *s1, char const *s2);
 char	**ft_split(const char *s, char c);
+char	*ft_itoa(int n);
 
 #endif