C # 3 Threads a B C prints 123123123 sequentially.

C # Classic Interview questions:

There are 3 threads, a thread print 1,b thread print 2,c thread print 3, please use the program implementation to print 123123123 ...

1  class Program2     {3         Static voidMain (string[] args)4         {5             varMT =NewMyThread ();6 Mt. Run ();7 8 console.readline ();9         }Ten     } One  A      -    Internal classMyThread -    { the        Private intNumber =0; -        Objectobj =New Object(); -  -          Public voidRun () +         { -             varTA =NewThread (printnumber); +             varTB =NewThread (printnumber); A             varTC =NewThread (printnumber); at  -Ta. Start ("1"); -Tb. Start ("2"); -Tc. Start ("3"); -         } -  in        Private voidPrintnumber (Objectnum) -        { to             for(inti =0; I <9; i++) +            { -                Lock(obj) the                { *                    if(Convert.ToInt32 (num) = = number +1|| Convert.ToInt32 (num) = = number-2) $                    {Panax Notoginseng Console.Write (num); -Number =Convert.ToInt32 (num); the  +                        //notifies a waiting thread A Monitor.pulseall (obj); the                    } +                    Else -                    { $                        //this round should not print the thread, let him wait for the notice outside the lock $                        //because this time he also executed the judgment, so the cycle is one less -i--; - monitor.wait (obj); the                    } -                }Wuyi            }            the        } -}

Steal @ Song Xingju-sindrol Classmate's code: C # Add three threads to start executing a method at the same time, and then call the loop in a method in turn to print the output

C # 3 Threads a B C prints 123123123 sequentially.