1 files changed, 7 insertions, 0 deletions
diff --git a/inc/stack.h b/inc/stack.h
index 60d41b8..fcc976a 100644
--- a/inc/stack.h
+++ b/inc/stack.h
@@ -1,6 +1,13 @@
 #ifndef __STACK_H__
 #define __STACK_H__
 
+#define STACK_SIZE 100
+
+struct stack_st {
+    int len;
+    int arr[STACK_SIZE];
+};
+
 void stackPush(int val);
 int stackPop(void);
 int stackIsEmpty(void);