From d5f13f7bd9b567d2e934c549d7096f74b6e06031 Mon Sep 17 00:00:00 2001
From: Michele Bini <michele.bini@gmail.com>
Date: Sat, 11 Jun 2022 04:22:57 +0200
Subject: Further simplify code


diff --git a/src/displayapp/screens/Calculator.cpp b/src/displayapp/screens/Calculator.cpp
index 979d12b..e1f36f6 100644
--- a/src/displayapp/screens/Calculator.cpp
+++ b/src/displayapp/screens/Calculator.cpp
@@ -188,9 +188,7 @@ bool Calculator::Eval() {
       }
     }
 
-    char next = input.top();
-    input.pop();
-
+    char next = input.pop();
     switch (next) {
       case '+':
       case '-':
@@ -206,8 +204,7 @@ bool Calculator::Eval() {
                    // or (the operator at the top of the operator stack has equal precedence and the token is left associative))
                    || (getPrecedence(operators.top()) == getPrecedence(next) && leftAssociative(next)))) {
           // need two elements on the output stack to add a binary operator
-          if (!output.pushOperator(operators.top())) return false;
-          operators.pop();
+          if (!output.pushOperator(operators.pop())) return false;
         }
         operators.push(next);
         expectingNumber = true;
@@ -232,8 +229,7 @@ bool Calculator::Eval() {
       case ')':
         while (operators.top() != '(') {
           // need two elements on the output stack to add a binary operator
-          if (!output.pushOperator(operators.top())) return false;
-          operators.pop();
+          if (!output.pushOperator(operators.pop())) return false;
           if (operators.empty()) return false;
         }
         // discard the left parentheses
-- 
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