From d610ef690f9e131dcd839c3dd3545fb2417859f4 Mon Sep 17 00:00:00 2001
From: Hannes Kuchelmeister <hannes@kuchelmeister.org>
Date: Sun, 10 Jan 2021 15:23:40 +0100
Subject: [PATCH] fix compilation error

---
 Assignment_3/lib/ADT_Stack.h | 7 ++++++-
 Assignment_3/lib/Stack.cpp   | 2 +-
 Assignment_3/main.cpp        | 1 +
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/Assignment_3/lib/ADT_Stack.h b/Assignment_3/lib/ADT_Stack.h
index e9b53ed..aaa2ba7 100644
--- a/Assignment_3/lib/ADT_Stack.h
+++ b/Assignment_3/lib/ADT_Stack.h
@@ -1,3 +1,6 @@
+#ifndef ADT_Stack_H
+#define ADT_Stack_H
+
 #include <stack>
 #include <vector>
 #include <mutex>
@@ -30,4 +33,6 @@ class ADTOperationQueue{
     void enqueue(operation op);
     operation dequeue();
     size_t size();
-};
\ No newline at end of file
+};
+
+#endif
\ No newline at end of file
diff --git a/Assignment_3/lib/Stack.cpp b/Assignment_3/lib/Stack.cpp
index 8774ec6..c629822 100644
--- a/Assignment_3/lib/Stack.cpp
+++ b/Assignment_3/lib/Stack.cpp
@@ -12,7 +12,7 @@ Stack::Stack(ADTOperationQueue * queue){
 
 void Stack::push(int element) { return; }
 int Stack::pop() { return 0; }
-void Stack::size() { return 0; }
+int Stack::size() { return 0; }
 
 std::string Stack::print_stack(){
     Node* c = this->first->next;
diff --git a/Assignment_3/main.cpp b/Assignment_3/main.cpp
index e5f6e4c..b8f74db 100644
--- a/Assignment_3/main.cpp
+++ b/Assignment_3/main.cpp
@@ -41,6 +41,7 @@ std::vector<operation> generate_operations_uniform(){
                 break;
         }
     }
+    return operations;
 }
 
 void run_worker(std::vector<operation>* operations, Stack* stack) {