added to aas3

ass3/simulator_SIC_XE/include/file_device.h

@@ -0,0 +1,23 @@
+#ifndef FILE_DEVICE_H 
+#define FILE_DEVICE_H
+
+#include "device.h"
+#include <fstream>
+#include <string>
+
+class FileDevice : public Device {
+public:
+    explicit FileDevice(const std::string &filename);
+    ~FileDevice();
+    unsigned char read() override;
+    void write(unsigned char value) override;
+
+private:
+    void ensureFileOpen();
+    std::fstream fileStream;
+    std::string filename;
+    bool fileCreated;
+    std::streampos readPosition;
+};
+
+#endif // FILE_DEVICE_H