Add files

ft_is_positive/ft_is_positive.c

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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_is_positive.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: Syxpi <admin@syxpi.fr>                     +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/28 12:12:07 by Syxpi             #+#    #+#             */
+/*   Updated: 2026/02/28 12:14:15 by Syxpi            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <unistd.h>
+
+void	ft_is_positive(int nb)
+{
+	char	c;
+
+	if (nb >= 0)
+		c = 'P';
+	else
+		c = 'N';
+	write(1, &c, 1);
+}
+
+int	main(void)
+{
+	ft_is_positive(42);
+	ft_is_positive(-5);
+	write(1, "\n", 1);
+	return (0);
+}