Handle negative numbers for error message

ex00/main.c

@@ -6,7 +6,7 @@
 /*   By: jtorrez- <marvin@42.fr>                    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/03/18 20:15:26 by jtorrez-          #+#    #+#             */
-/*   Updated: 2023/03/19 18:18:18 by tischmid         ###   ########.fr       */
+/*   Updated: 2023/03/19 19:07:32 by tischmid         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -19,15 +19,15 @@ void	ft_putstr(char *str);
 // Parses the program arguments and fails if the number of passed
 // arguments is not 2 or 0.
 // Also fails if the passed arguments are out of
-// bounds (200 for width, 100 for height).
+// bounds (0-200 for width, 0-100 for height).
 // argv[0] contains the path of the executable, eg ./rush00
 int	main(int argc, char *argv[])
 {
 	int	width;
 	int	height;
 
-	width = 5;
-	height = 3;
+	width = 10;
+	height = 5;
 	if (argc != 1 && argc != 3)
 	{
 		ft_putstr("Usage: ");
@@ -40,26 +40,33 @@ int	main(int argc, char *argv[])
 		width = ft_atoi(argv[1]);
 		height = ft_atoi(argv[2]);
 	}
-	if (width >= 200)
-		ft_putstr("Width must be less than 200\n");
-	else if (height >= 100)
-		ft_putstr("Height must be less than 100\n");
+	if (width < 0 || width > 200)
+		ft_putstr("Width must be in the range of 0 to 200\n");
+	else if (height < 0 || height > 100)
+		ft_putstr("Height must be in the range of 0 to 100\n");
 	else
 		rush(width, height);
 	return (0);
 }
 
-// Convert a string to an integer
+// Convert a string to a non-zero integer
 int	ft_atoi(char *str)
 {
 	int	i;
+	int	sign;
 	int	number;
 
 	i = 0;
 	number = 0;
+	sign = 1;
+	if (str[i] == '-')
+	{
+		sign = -1;
+		++i;
+	}
 	while (str[i] >= '0' && str[i] <= '9')
 		number = number * 10 + (str[i++] - '0');
-	return (number);
+	return (sign * number);
 }
 
 // Display a null-terminated string on standard output.