finish the program and fix when a wire goes undefined

src/NandGate.cpp

@@ -11,7 +11,6 @@ NandGate::NandGate(int d, Wire * wire1, Wire * wire2, Wire * wire3)
 
 Event NandGate::evaluate(int evTime)
 {
-	cout << evTime << " " << in1->getValue(evTime) << " " << in2->getValue(evTime) << endl;
 	if (in1->getValue(evTime) == 0 || in2->getValue(evTime) == 0) {
 		return Event(1, evTime + delay, out);
 	}

src/Simulation.cpp

@@ -110,8 +110,8 @@ bool Simulation::parseVector(string fileName) {
 		return false;
 	}
 
-	string tmpString;
-	int timeInt, valInt;
+	string tmpString, valInt;
+	int timeInt;
 	Wire *tmpWire = nullptr;
 
 	// get rid of first line
@@ -129,7 +129,12 @@ bool Simulation::parseVector(string fileName) {
 			}
 		}
 
-		e.push(Event(valInt, timeInt, tmpWire));
+		if (valInt == "X") {
+			e.push(Event(-1, timeInt, tmpWire));
+		}
+		else {
+			e.push(Event(atoi(valInt.c_str()), timeInt, tmpWire));
+		}
 	}
 }