+void ZonePlop (int base);
+void IndPlop (int Den, int Value);
+void ComPlop (int Den, int Value);
+void ResPlop (int Den, int Value);
+int EvalLot (int x, int y);
+void BuildHouse(int value);
+void DoIndOut(int pop, int value);
+void DoComOut(int pop, int value);
+void DoResOut(int pop, int value);
+void IncROG(int amount);
+void DoIndIn(int pop, int value);
+void DoComIn(int pop, int value);
+void DoResIn(int pop, int value);
+void MakeHosp(void);
+void DoResidential(int ZonePwrFlg);
+int EvalRes (int traf);
+int EvalCom (int traf);
+int GetCRVal(void);
+void DoCommercial(int ZonePwrFlg);
+void DoIndustrial(int ZonePwrFlg);
+int EvalInd (int traf);
+void DoHospChur(void);
+
+
+void DoZone(void)