Initial commit of code for dopelib, and ch 1, 2, and 12

libs/chapter2/reverse.cpp

@@ -0,0 +1,32 @@
+#include "chapter2.hpp"
+#include <stack>
+
+/*
+Reverse Linked List
+ */
+
+void reverse_linkedlist(DopeLinkedList* ll){
+  DopeNode* node = ll->GetHead();
+  DopeNode* prev = nullptr;
+  std::stack<DopeNode*> s;
+  int iter_cnt = 0;
+  s.push(node);
+  while(node->GetNext() != NULL){
+    s.push(node);
+    node = node->GetNext();
+    iter_cnt++;
+  }
+  s.push(node);
+
+  prev = s.top();
+  s.pop();
+  ll->SetHead(prev);
+  while(!s.empty()){
+    node = s.top();
+    s.pop();
+    prev->SetNext(node);
+    prev = node;
+  }
+  node->SetNext(nullptr);
+
+}