XPost: comp.theory, comp.lang.c++, comp.ai.philosophy   
   From: polcott333@gmail.com   
      
   Please think this all the way through without making any guesses   
      
      
   Simulating Termination Analyzer HHH correctly simulates its input until:   
   (a) Detects a non-terminating behavior pattern:   
        abort simulation and return 0.   
   (b) Simulated input reaches its simulated "return" statement:   
        return 1.   
   (c) If HHH must abort its simulation to prevent its own non-termination   
        then HHH is correct to abort this simulation and return 0.   
      
   typedef int (*ptr)();   
   int HHH(ptr P);   
      
   int DD()   
   {   
      int Halt_Status = HHH(DD);   
      if (Halt_Status)   
        HERE: goto HERE;   
      return Halt_Status;   
   }   
      
   int main()   
   {   
      HHH(DD);   
   }   
      
   What value should HHH(DD) correctly return?   
      
      
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