This C++ program is simulating work of traffic light, you can control the traffic light trough simple user interface.
There is class Semaphore that has attributes status and light. Status is enumeration : enum Status {sOUT, sOFF, sON, sBLINK} and light is also enumeration : enum Color {cNONE, cRED, cYELLOWRED, cYELLOWGREEN, cYELLOW, cGREEN, cBLINK}.
There is also test program that shows what this class can do.

Interface is in serbian, for translation contact me.

/* --------------------------- HEADER ---------------------------- */ /* opis: klasa za semafor autor: Milko Leporis datum: 13.12.2005 */ #ifndef KLASS_SEMAFOR #define KLASS_SEMAFOR enum Status {sOUT, sOFF, sON, sBLINK}; enum Color {cNONE, cRED, cYELLOWRED, cYELLOWGREEN, cYELLOW, cGREEN, cBLINK}; class Semaphore { private: Status status; Color light; public: Semaphore(){ status = sOFF; light = cNONE; } Color GetColor() const; Status GetStatus() const; int TurnOn(); int TurnOff(); int TurnBlink(); int IsDown(); int IsRepeared(); int ChangeColor(); }; #endif /* ------------------ REALIZACIJA ----------------------------- */ /* opis: realizacija klase semafor autor: Milko Leporis datum: 13.12.2005 */ #include "semafor.h" int Semaphore::TurnOn(){ if(status == sOFF) { status = sON; light = cRED; return 1; }else return 0; } int Semaphore::TurnOff(){ if(status == sON || status == sBLINK){ status = sOFF; light = cNONE; return 1; }else return 0; } int Semaphore::TurnBlink(){ if(status == sOFF){ status = sBLINK; light = cBLINK; return 1; }else return 0; } int Semaphore::IsDown(){ if(status != sOUT){ status = sOUT; light = cNONE; return 1; }else return 0; } int Semaphore::IsRepeared(){ if(status == sOUT){ status = sOFF; light = cNONE; return 1; }else return 0; } int Semaphore::ChangeColor(){ if(status == sON){ switch (light){ case cRED : light = cYELLOWRED; break; case cYELLOWRED : light = cGREEN; break; case cYELLOWGREEN : light = cRED; break; case cGREEN: light = cYELLOWGREEN; break; } return 1; }else return 0; } Color Semaphore::GetColor() const{ return light; } Status Semaphore::GetStatus() const{ return status; } /* ------------------------- TEST PROGRAM ---------------------------- */ /* opis: test program za klasu semafor autor: Milko Leporis datum: 13.12.2005 */ #include <stdio_ext.h> #include "semafor.h" void ShowSem (const Semaphore &s) { switch(s.GetStatus()){ case sOUT: printf("\nStatus: Pokvaren");break; case sOFF: printf("\nStatus: Iskljucen");break; case sON: printf("\nStatus: Ukljucen");break; case sBLINK: printf("\nStatus: sBLINK");break; } switch(s.GetColor()){ case cNONE: printf("\nBoja: cNONE");break; case cRED: printf("\nBoja: Crvena");break; case cGREEN: printf("\nBoja: Zelena");break; case cBLINK: printf("\nBoja: Zuto - trepcuce");break; case cYELLOWRED: case cYELLOWGREEN: case cYELLOW: printf("\nBoja: Zuta");break; } } char meni(){ char rez; printf("\n\nMENI:\n"); printf("\n\t1. Ukljuci semafor"); printf("\n\t2. Iskljuci semafor"); printf("\n\t3. Pokvari semafor"); printf("\n\t4. Popravi semafor"); printf("\n\t5. Postavi trepcuce zuto"); printf("\n\t6. Promeni boju"); printf("\n\t7. Kraj rada"); printf("\n\n"); __fpurge(stdin); rez=getchar(); return rez; } int main(void) { char odg; Semaphore s; do{ ShowSem(s); odg=meni(); switch(odg){ case '1': s.TurnOn(); break; case '2': s.TurnOff(); break; case '3': s.IsDown(); break; case '4': s.IsRepeared(); break; case '5': s.TurnBlink(); break; case '6': s.ChangeColor(); break; } }while(odg!='7'); return 0; }