1 files changed, 11 insertions, 0 deletions
diff --git a/src/02/03/stack.h b/src/02/03/stack.h
new file mode 100644
index 0000000..e3c63e3
--- /dev/null
+++ b/src/02/03/stack.h
@@ -0,0 +1,11 @@
+#include "node.h"
+
+typedef struct {
+  Node *head;
+} Stack;
+
+Stack *stack_init();
+void *stack_peek(Stack *self);
+int stack_size(Stack *self);
+void stack_push(Stack *self, void *data);
+void *stack_pop(Stack *self);