Nothing to worry about

src/AndGate.h

@@ -4,6 +4,8 @@
 #include "Event.h"
 #include "Wire.h"
 
+using namespace std;
+
 class AndGate : public Gate {
 	public:
 		AndGate(int d, Wire* wire1, Wire* wire2, Wire* wire3);

src/NorGate.h

@@ -4,6 +4,8 @@
 #include "Event.h"
 #include "Wire.h"
 
+using namespace std;
+
 class NorGate : public Gate {
 	public:
 		NorGate(int d, Wire* wire1, Wire* wire2, Wire* wire3);

src/NotGate.h

@@ -4,6 +4,8 @@
 #include "Wire.h"
 #include "Event.h"
 
+using namespace std;
+
 class NotGate : public Gate {
 	public:
 		NotGate(int d, Wire* wire1, Wire* wire2);

src/OrGate.h

@@ -4,6 +4,8 @@
 #include "Event.h"
 #include "Wire.h"
 
+using namespace std;
+
 class OrGate : public Gate {
 	public:
 		OrGate(int d, Wire* wire1, Wire* wire2, Wire* wire3);

src/XnorGate.h

@@ -4,6 +4,8 @@
 #include "Event.h"
 #include "Wire.h"
 
+using namespace std;
+
 class XnorGate : public Gate {
 	public:
 		XnorGate(int d, Wire* wire1, Wire* wire2, Wire* wire3);

src/XorGate.h

@@ -4,6 +4,8 @@
 #include "Event.h"
 #include "Wire.h"
 
+using namespace std;
+
 class XorGate : public Gate {
 	public:
 		XorGate(int d, Wire* wire1, Wire* wire2, Wire* wire3);