From 53e30cdd779f12ba5b19a59e9e18abf69c795ad5 Mon Sep 17 00:00:00 2001
From: jantuomi <jans.tuomi@gmail.com>
Date: Thu, 1 Sep 2016 13:47:24 +0300
Subject: Add sum function

---
 src/main.cpp    |  2 ++
 src/runtime.cpp | 29 ++++++++++++++++++++++-------
 src/runtime.h   |  7 +++++--
 3 files changed, 29 insertions(+), 9 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 53a6540..8a00d55 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -37,5 +37,7 @@ int main(int argc, char** argv) {
     runtime.initValues(values);
     runtime.run(tokens);
 
+    runtime.printValues();
+
     return 0;
 }
diff --git a/src/runtime.cpp b/src/runtime.cpp
index 26c5885..3f61060 100644
--- a/src/runtime.cpp
+++ b/src/runtime.cpp
@@ -1,4 +1,5 @@
 #include "runtime.h"
+#include <iostream>
 
 Runtime::Runtime() {
 
@@ -6,20 +7,34 @@ Runtime::Runtime() {
 
 void Runtime::initValues(const std::vector<int>& values) {
     for (const int i : values) {
-        m_values.push(i);
+        m_values.push_back(i);
     }
 }
 
-/* Returns false if token is not a command */
-bool Runtime::runCommand(const Token& token) {
-    // TODO
-    return false;
+void Runtime::runCommand(const Token& token) {
+    if (token.getLexeme() == "S") {
+        doSum();
+    }
 }
 
 void Runtime::run(std::vector<Token>& tokens) {
     for (auto& token : tokens) {
-        if (!runCommand(token)) {
+        runCommand(token);
+    }
+}
 
-        }
+void Runtime::printValues() const {
+    for (const int value : m_values) {
+        std::cout << value << " ";
     }
+    std::cout << std::endl;
+}
+
+void Runtime::doSum() {
+    int sum = 0;
+    for (const int i : m_values) {
+        sum += i;
+    }
+
+    m_values.push_back(sum);
 }
diff --git a/src/runtime.h b/src/runtime.h
index af8351f..16c1c28 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -5,11 +5,14 @@
 
 class Runtime {
     private:
-        std::stack<int> m_values;
-        bool runCommand(const Token& token);
+        std::vector<int> m_values;
+        void runCommand(const Token& token);
+
+        void doSum();
 
     public:
         Runtime();
         void initValues(const std::vector<int>& values);
         void run(std::vector<Token>& tokens);
+        void printValues() const;
 };
-- 
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