multithreading - Thread Program in visual C++/CLI giving errors -


i trying follow tutorial @ http://www.drdobbs.com/cpp/ccli-threading-part-i/184402018 thread programming in winform in visual c++. opened win32 console project , added empty cpp file inside placed code follows:

    using namespace system;     using namespace system::threading;      public class threadx{          int loopstart;         int loopend;         int dispfrequency;          public:           threadx(int startvalue, int endvalue, int frequency)         {             loopstart = startvalue;             loopend = endvalue;             dispfrequency = frequency;         }          void threadentrypoint()         {             string^ threadname = thread::currentthread->name;              (int = loopstart; <= loopend; ++i)             {                 if ( % dispfrequency == 0)                 {                     console::writeline("{0} : = {1,10}", threadname, i);                 }             }             console::writeline("{0} thread terminating", threadname);         } };  int main() {     threadx o1 = gcnew threadx(0, 1000000,200000);     thread^ t1 = gcnew thread(gcnew threadstart(o1, &threadx::threadentrypoint));     t1->name = "t1";      threadx o2 = gcnew threadx(-1000000, 0, 200000);     thread^ t2 = gcnew thread(gcnew threadstart(o2, &threadx::threadentrypoint));     t1->name = "t2";      t1->start();     t2->start();     console::writeline("primary thread terminating"); }

however gives me errors such :

  1. error c2726: 'gcnew' may used create object managed type
  2. error c2440: 'initializing' : cannot convert 'threadx *' 'threadx' no constructor take source type, or constructor overload resolution ambiguous
  3. error c3364: 'system::threading::threadstart' : invalid argument delegate constructor; delegate target needs pointer member function

you mixing c++ , c++/cli different thing. replace

public class threadx

with

public ref class threadx

Comments

Post a Comment