diff --git a/TP1/ex3 b/TP1/ex3
new file mode 100755
index 0000000..4848624
Binary files /dev/null and b/TP1/ex3 differ
diff --git a/TP1/ex3.c b/TP1/ex3.c
new file mode 100644
index 0000000..02224bc
--- /dev/null
+++ b/TP1/ex3.c
@@ -0,0 +1,69 @@
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+
+void	my_putnbr(int nb)
+{
+	char c;
+
+	if (nb < 0)
+	{
+		if (nb == -2147483648)
+		{
+			write(1, "-", 1);
+			write(1, "2", 1);
+			my_putnbr(147483648);
+			return ;
+		}
+		nb = nb * -1;
+		write(1, "-", 1);
+	}
+	if (nb >= 0 && nb < 10)
+	{
+		c = nb + '0';
+		write(1, &c, 1);
+	}
+	if (nb >= 10)
+	{
+		my_putnbr(nb / 10);
+		my_putnbr(nb % 10);
+	}
+}
+
+int	main(void)
+{
+	pid_t	pid;
+	int	i;
+	int	status;
+
+	i = 0;
+	status = 0;
+	switch(pid=fork())
+	{
+		case -1 :
+			write(2, "fork foireux\n", 13);
+			exit(errno);
+		case  0 :
+			while (i < 10)
+			{
+				my_putnbr(i);
+				write(1, "\n", 1);
+				nanosleep((const struct timespec[]){{0, 500000000L}}, NULL);
+				i++;
+			}
+			system("ps -f");
+			exit(2);
+		default :
+			//waitpid plutot que wait, on sait jamais si un fils caché venait à se présenter... Ça ruine des marriages ce genre d'histoire
+			waitpid(pid, &status, 0);
+			write(1, "Code de retour du fils : ", 25);
+			my_putnbr(status);
+			write(1, ".\n", 2);
+			write(1, "Fin du processus père de pid ", 30);
+			my_putnbr(getpid());
+			write(1, ".\n", 3);
+	} 
+	exit(0);
+}