list11-1.txt

这是c++编程方面的名著的例子代码

    1   // Listing 11 - 1
    2   // Definitions For threaded_calculator
    3   
    4   #include <calculat.h>
    5   #include <ctthread.h>
    6   
    7   
    8   threaded_calculator::threaded_calculator(void)
    9   {
   10        Result = 0;
   11   }
   12   
   13   double  threaded_calculator::evaluate(string Input)
   14   {
   15       ct_thread Thread;
   16       double Temp;
   17       lock();
   18       InputString = Input;
   19       Thread.begin(::evaluate,this);
   20       Thread.wait();
   21       Temp = Result;
   22       unlock();
   23       return(Temp);
   24   }
   25   
   26   list<expression_component> threaded_calculator::parse(string Input)
   27   {
   28      ct_thread Thread;
   29      list<expression_component> Temp;
   30      lock();
   31      InputString = Input;
   32      Thread.begin(::parse,this);
   33      Thread.wait();
   34      Temp = Tokens;
   35      unlock();
   36      return(Temp);
   37   }
   38   
   39   void evaluate(void *X)
   40   {
   41      threaded_calculator *Calc;
   42      Calc = static_cast<threaded_calculator *> (X);
   43      mt_calculator Calculator;
   44      Calc->Result = Calculator.evaluate(Calc->InputString);
   45   }
   46   
   47   void parse(void *X)
   48   {
   49     threaded_calculator *Calc;
   50     Calc = static_cast<threaded_calculator *> (X);
   51     mt_calculator Calculator;
   52     Calc->Tokens = Calculator.parse(Calc->InputString);
   53   }