add

1 files changed, 16 insertions, 0 deletions

diff --git a/data_structures/chapter_3/stack_array.h b/data_structures/chapter_3/stack_array.h
new file mode 100644
index 0000000..088b0cc
--- /dev/null
+++ b/data_structures/chapter_3/stack_array.h
@@ -0,0 +1,16 @@
+#ifndef _STACK_H
+
+struct stack_record;
+typedef struct stack_record *stack;
+typedef int elem;
+
+int is_empty(stack s);
+int is_full(stack s);
+stack create_stack(int max_elements);
+void dispose_stack(stack s);
+void push(elem x, stack s);
+elem top(stack s);
+void pop(stack s);
+elem top_and_pop(stack s);
+
+#endif