diff --git a/src/syntax.cpp b/src/syntax.cpp
index a6733d4..c9ba282 100644
--- a/src/syntax.cpp
+++ b/src/syntax.cpp
@@ -19,7 +19,7 @@ NumNode::NumNode(float num) {
 }
 
 void NumNode::display() {
-  
+  cout << num;
 }
 
 StringNode::StringNode(string* stringVal) {
@@ -27,7 +27,7 @@ StringNode::StringNode(string* stringVal) {
 }
 
 void StringNode::display() {
-  
+  cout << *stringVal;
 }
 
 OpNode::OpNode(int op, Node *first, Node *second) {
@@ -37,7 +37,9 @@ OpNode::OpNode(int op, Node *first, Node *second) {
 }
 
 void OpNode::display() {
-  
+  first->display();
+  cout << " " << (char)op << " ";
+  second->display();
 }
 
 void print_expression_list(NodeList *list) {