first commit

ended/C00/ex04/ft_is_negative.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <unistd.h>
+
+void	ft_is_negative(int n)
+{
+	if (n < 0)
+	{
+		write(1, "N", 1);
+	}
+	else
+	{
+		write(1, "P", 1);
+	}
+}