diff --git a/c03/ex00.c b/c03/ex00.c
new file mode 100644
index 0000000..95e9f9a
--- /dev/null
+++ b/c03/ex00.c
@@ -0,0 +1,45 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ex00.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: achubuko <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2023/11/29 19:42:18 by achubuko          #+#    #+#             */
+/*   Updated: 2023/11/29 22:09:07 by achubuko         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <tests.h>
+#include <stdlib.h>
+#define TEST_BUF_SIZE 100
+
+int	ft_strcmp(char *s1, char *s2);
+
+int	main(void)
+{
+	char	s[TEST_BUF_SIZE] = "Hello World!";
+	char	d1[TEST_BUF_SIZE] = "Hello World!";
+	char	d2[TEST_BUF_SIZE] = "Hello Sarld!";
+	int		r1;
+	int		r2;
+
+	printf("initial strings:\n");
+	dump(s, 20);
+	dump(d1, 20);
+	dump(d2, 20);
+
+	printf("strcmp(d2, s):\n");
+	r1 = strcmp(d2, s);
+	r2 = ft_strcmp(d2, s);
+	printf("return values: orig: %i ft: %i\n", r1, r2);
+	printf("strcmp(s, d2):\n");
+	r1 = strcmp(s, d2);
+	r2 = ft_strcmp(s, d2);
+	printf("return values: orig: %i ft: %i\n", r1, r2);
+	printf("strcmp(s, d1):\n");
+	r1 = strcmp(s, d1);
+	r2 = ft_strcmp(s, d1);
+	printf("return values: orig: %i ft: %i\n", r1, r2);
+	return 0;
+}
diff --git a/c03/ex01.c b/c03/ex01.c
new file mode 100644
index 0000000..a3fb1b1
--- /dev/null
+++ b/c03/ex01.c
@@ -0,0 +1,51 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ex00.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: achubuko <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2023/11/29 19:42:18 by achubuko          #+#    #+#             */
+/*   Updated: 2023/11/29 22:14:59 by achubuko         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <tests.h>
+#include <stdlib.h>
+#define TEST_BUF_SIZE 100
+
+int	ft_strncmp(char *s1, char *s2, unsigned int n);
+
+int	main(void)
+{
+	char	s[TEST_BUF_SIZE] = "Hello World!";
+	char	d1[TEST_BUF_SIZE] = "Hello World!";
+	char	d2[TEST_BUF_SIZE] = "Hello Sarld!";
+	char	d3[TEST_BUF_SIZE] = "Hell";
+	int		r1;
+	int		r2;
+
+	printf("initial strings:\n");
+	dump(s, 20);
+	dump(d1, 20);
+	dump(d2, 20);
+	dump(d3, 20);
+
+	printf("strncmp(d2, s, 5):\n");
+	r1 = strncmp(d2, s, 5);
+	r2 = ft_strncmp(d2, s, 5);
+	printf("return values: orig: %i ft: %i\n", r1, r2);
+	printf("strncmp(s, d2, 20):\n");
+	r1 = strncmp(s, d2, 20);
+	r2 = ft_strncmp(s, d2, 20);
+	printf("return values: orig: %i ft: %i\n", r1, r2);
+	printf("strncmp(s, d1, 15):\n");
+	r1 = strncmp(s, d1, 15);
+	r2 = ft_strncmp(s, d1, 15);
+	printf("return values: orig: %i ft: %i\n", r1, r2);
+	printf("strncmp(s, d3, 15):\n");
+	r1 = strncmp(s, d3, 15);
+	r2 = ft_strncmp(s, d3, 15);
+	printf("return values: orig: %i ft: %i\n", r1, r2);
+	return 0;
+}