Replaced ints with uints and added comments indicating where I'll want delete statements in the future.

src/main.cpp

@@ -38,6 +38,7 @@ void interpret_file(char* fileName) {
   struct Environment* env = new Environment();
   eval_statement(result, env);
   delete_environment(env);
-  
+  // delete env;
+
   delete result;
 }

src/operations/node.cpp

@@ -15,14 +15,14 @@ void attach_node(struct Node* parent, struct Node* child) {
   if (parent->num_children > MAX_CHILDREN) { std::cerr << "Error, max children attached to a node" << std::endl; }
 }
 
-void check_num_nodes(struct Node* node, int num_children, std::string error) {
+void check_num_nodes(struct Node* node, uint num_children, std::string error) {
   if (node && node->num_children != num_children) {
     std::cerr << "Error, " << error << std::endl;
   }
 }
 
-void print_tree(struct Node* node, int tabs) {
-  int i;
+void print_tree(struct Node* node, uint tabs) {
+  uint i;
   /* base case */
   if(!node) {
     std::cerr << "NO TREE STRUCTURE" << std::endl;
@@ -113,6 +113,7 @@ struct Value* eval_expression(struct Node* node, struct Environment* env) {
           eval_expression(node->children[1], env)));
       tempVal =  eval_expression(tempNode->children[1], local_env);
       delete_environment(local_env);
+      // delete local_env;
       return tempVal;
       break;
     case PLUS:

src/operations/node.hpp

@@ -17,19 +17,21 @@ struct Node {
   std::string id;
 
   /* at most three children nodes */
-  int num_children;
+  uint num_children;
   std::array<struct Node*, MAX_CHILDREN> children;
 
   Node(int t, struct Value* v, std::string s) {
     type = t;
     value = v;
     id = s;
-    for (int i = 0; i < MAX_CHILDREN; i++) {
+    for (uint i = 0; i < MAX_CHILDREN; i++) {
       children[i] = nullptr;
     }
   }
   ~Node() {
-    for (int i = 0; i < num_children; i++) {
+    if (value) { delete value; }
+    // delete value;
+    for (uint i = 0; i < num_children; i++) {
       delete children[i];
     }
   }

src/shell.cpp

@@ -70,5 +70,6 @@ void start_shell() {
     }
 
     delete_environment(env);
+    // delete env;
     delete result;
 }

src/variables/environment.hpp

@@ -1,12 +1,18 @@
 #ifndef ENVIRONMENT_H
 #define ENVIRONMENT_H
 
+#include "variable.hpp"
 #include <string>
 #include <vector>
 
 struct Environment {
   std::vector<struct Variable*> vars;
   Environment() {  }
+  // ~Environment() { 
+  //   for (uint i = 0; i < size(vars); i++) {
+  //       delete vars[i];
+  //   }
+  // }
 };
 
 // Variable Lookup Functions