Adding C-Strings

2026-06-12 08:51:03 +02:00
commit e92a880178
8 changed files with 547 additions and 0 deletions
@@ -0,0 +1,106 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_atoi.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: lclerel- <lclerel-@learner.42.tech>        +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/03/24 12:58:12 by lclerel-          #+#    #+#             */
+/*   Updated: 2026/03/24 13:23:45 by lclerel-         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <unistd.h>
+
+int	ft_atoi(char *str)
+{
+	int	i;
+	int	sign;
+	int	res;
+
+	res = 0;
+	i = 0;
+	sign = 1;
+	while (str[i] == ' ' || (str[i] >= 9 && str[i] <= 13))
+		i++;
+	while (str[i] == '-' || str[i] == '+')
+	{
+		if (str[i] == '-')
+			sign *= -1;
+		i++;
+	}
+	while (str[i] >= '0' && str[i] <= '9')
+	{
+		res = (res * 10) + (str[i] - '0');
+		i++;
+	}
+	return (res * sign);
+}
+
+/*
+void	ft_putnbr(int nb)
+{
+	char	value;
+
+	if (nb == -2147483648)
+	{
+		write(1, "-2147483648", 11);
+		return ;
+	}
+	if (nb < 0)
+	{
+		write(1, "-", 1);
+		nb = -nb;
+	}
+	if (nb > 9)
+	{
+		ft_putnbr(nb / 10);
+	}
+	value = nb % 10 + '0';
+	write(1, &value, 1);
+}
+
+int	main(void)
+{
+	int	res;
+
+	// Test 1
+	write(1, "/~~~Test 1~~~\\\n", 15);
+	write(1, "> Test avec -------+-----101010 : <\n", 36);
+	res = ft_atoi(" -------+-----101010");
+	if (res == -101010)
+		write(1, "> OK. :3 <\n", 11);
+	else 
+		write(1, "> Not OK :( <\n", 14);
+	write(1, "> Resultat retourner : ", 23);
+	ft_putnbr(res);
+	write(1, " <\n\\~~~Test 1~~~/\n\n", 18);
+	// Fin Test 1
+	write(1, "\n", 1);
+	// Test 2
+	write(1, "/~~~Test 2~~~\\\n", 15);
+	write(1, "> Test avec NULL : <\n", 21);
+	res = ft_atoi("NULL");
+	if (res == 1)
+		write(1, "> OK. :3 <\n", 11);
+	else
+		write(1, "> Not OK :( <\n", 14);
+	write(1, "> Resultat retourner : ", 23);
+	ft_putnbr(res);
+	write(1, " <\n\\~~~Test 2~~~/\n", 18);
+	// Fin Test 2
+	write(1, "\n", 1);
+	// Test 3
+	write(1, "/~~~Test 3~~~\\\n", 15);
+	write(1, "> Test avec 213d6516 : <\n", 25);
+	res = ft_atoi("213d6516");
+	if (res == 213)
+		write(1, "> OK. :3 <\n", 11);
+	else
+		write(1, "> Not OK :( <\n", 14);
+	write(1, "> Resultat retourner : ", 23);
+	ft_putnbr(res);
+	write(1, " <\n\\~~~Test 3~~~/\n", 18);
+	// Fin Test 3
+	return (0);
+}*/