From 44ec4d12336e290ad8d1f6e1559e04bf19e79075 Mon Sep 17 00:00:00 2001
From: HombreLaser <sebastian-440@live.com>
Date: Thu, 28 Apr 2022 16:09:20 -0500
Subject: Corregido error de memoria

---
 main.cpp   | 11 ++++++++---
 parser.cpp |  3 ++-
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/main.cpp b/main.cpp
index 9328b1e..0c20f99 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,6 +2,7 @@
  * FACULTAD DE CIENCIAS FÍSICO MATEMÁTICAS
  * Luis Sebastián Martínez Vega - LCC */
 
+#include <cstddef>
 #include <iterator>
 #include <ostream>
 #include <string>
@@ -16,19 +17,20 @@
 using std::string, std::cin, std::cout, std::getline, std::vector,
   std::begin, std::end, std::endl;
 
-int main(){
+int main() {
   int counter = 1;
   string input;
   Parser parser;
-  Expression *tree, *simplified, *diff;
+  Expression *tree = NULL, *simplified = NULL, *diff = NULL;
 
   cout << ">> ";
   while(getline(cin, input)) {
     try {
       tree = parser.parse(input);
     } catch(const ParserException &e) {
-      cout << e.showMsg();
+      cout << e.showMsg() << "\n";
       cout << ">> ";
+      tree = NULL;
       continue;
     }
 
@@ -40,6 +42,9 @@ int main(){
     delete tree;
     delete simplified;
     delete diff;
+    tree = NULL;
+    simplified = NULL;
+    diff = NULL;
     ++counter;
   }
 
diff --git a/parser.cpp b/parser.cpp
index 98f6e2c..9c47555 100644
--- a/parser.cpp
+++ b/parser.cpp
@@ -10,7 +10,8 @@ using std::string, std::stoi;
 void Parser::panic() {
   for(auto ptr = tree_queue.begin(); ptr != tree_queue.end(); ++ptr)
     delete *ptr;
-
+  
+  tree_queue.clear();
   throw ParserException("Sintaxis incorrecta.");
 }
 
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