diff --git a/exemple/exemple_matrix.c b/exemple/exemple_matrix.c
new file mode 100644
index 0000000..65f281f
--- /dev/null
+++ b/exemple/exemple_matrix.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "sweet.h"
+
+void
+print4 (mat4 * m)
+{
+    printf ("%f %f %f %f\n", m->v[0], m->v[4], m->v[8],  m->v[12]);
+    printf ("%f %f %f %f\n", m->v[1], m->v[5], m->v[9],  m->v[13]);
+    printf ("%f %f %f %f\n", m->v[2], m->v[6], m->v[10], m->v[14]);
+    printf ("%f %f %f %f\n", m->v[3], m->v[7], m->v[11], m->v[15]);
+    printf ("\n");
+}
+
+int
+main ()
+{
+    mat4 m = sweet_matrix_rotation3h (SWEET_PI_OVER_2, 1.0, 1.0, 1.0);
+
+    print4 (&m);
+
+    sweet_matrix_inverse4 (&m, &m);
+    print4 (&m);
+    
+    sweet_matrix_inverse4 (&m, &m);
+    print4 (&m);
+
+    return 0;
+}
+
diff --git a/exemple/exemple_stack.c b/exemple/exemple_stack.c
new file mode 100644
index 0000000..801d1fa
--- /dev/null
+++ b/exemple/exemple_stack.c
@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "sweet.h"
+
+void
+print4 (mat4 * m)
+{
+    printf ("%f %f %f %f\n", m->v[0], m->v[4], m->v[8],  m->v[12]);
+    printf ("%f %f %f %f\n", m->v[1], m->v[5], m->v[9],  m->v[13]);
+    printf ("%f %f %f %f\n", m->v[2], m->v[6], m->v[10], m->v[14]);
+    printf ("%f %f %f %f\n", m->v[3], m->v[7], m->v[11], m->v[15]);
+    printf ("\n");
+}
+
+int
+main ()
+{
+    matrix_stack4 ms = sweet_matrix_stack4_new ();
+
+    print4 (sweet_matrix_stack4_get_matrix_pointer (&ms));
+
+    mat4 m = sweet_matrix_rotation3h (SWEET_PI_OVER_2, 1.0, 1.0, 1.0);
+    
+    sweet_matrix_stack4_mult (&ms, &m);
+    print4 (sweet_matrix_stack4_get_matrix_pointer (&ms));
+
+    sweet_matrix_stack4_push (&ms);
+    print4 (sweet_matrix_stack4_get_matrix_pointer (&ms));
+
+    sweet_matrix_stack4_mult (&ms, &m);
+    print4 (sweet_matrix_stack4_get_matrix_pointer (&ms));
+
+    sweet_matrix_stack4_pop (&ms);
+    print4 (sweet_matrix_stack4_get_matrix_pointer (&ms));
+
+    return 0;
+}
+