solved workshop exercise

Revision:
0:f4a1a7ba4cdc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.h	Tue Mar 12 15:00:59 2019 +0000
@@ -0,0 +1,27 @@
+#include "mbed.h"
+
+#include <stdlib.h>
+#include <string>
+#define TURN 5
+
+using namespace std;
+
+typedef struct question {
+    string answer;
+    bool shown;
+    int shown_as;
+} question_t;
+
+//Global variable
+Serial pc(SERIAL_TX, SERIAL_RX);
+DigitalOut led(LED1);
+Timeout timeout;
+
+InterruptIn mybutton(USER_BUTTON);
+
+int number_of_participants = 0;
+bool expired = false, paused = false, answering = false;
+string questions = "When was Linux invented? ; 1991 ; 2005 ; 1965 ; 1999!Which one of the following is NOT open source? ; Skype ; Docker ; Python ; PHP ; LibreOffice!What does the 'A' stand for in the term LAMP stack? ; Apache ; Ajax ; ActiveX ; ASP.NET!Firefox was made by what community? ; Mozilla ; Apple ; IBM ; Oracle!What animal is Tux, the Linux mascot? ; Penguin ; Mouse ; Horse ; Spider!Which Linux OS is commonly recommended for beginners? ; Ubuntu ; Gentoo ; FreeBSD ; Fedora!What is Audacity used for? ; Audio ; Art ; Programming ; Gaming!Which one of the following is open source? ; MySQL ; Windows ; iTunes ; Photoshop!What language was the Linux kernel written in? ; C ; Java ; C++ ; Ruby!Which one of the following is an open source license? ; GPL ; FTP ; GUID ; API!";
+string read_questions = "";
+
+string readline_serial();
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