Added stack data structure to allow students to do actual work.

5605029f · orestis.malaspin · 714e23f4 · 5605029f
Verified Commit 5605029f authored 3 years ago by orestis.malaspin
--- a/stack.h
+++ b/stack.h
+#ifndef _STACK_H_
+#define _STACK_H_
+
+typedef struct _stack {
+    int *data;
+    int capacity;
+    int top;
+} stack;
+
+#endif