list7-3.txt

这是c++编程方面的名著的例子代码

    1   #include <unistd.h>
    2   #include <stdlib.h>
    3   #include <stdio.h>
    4   #include <fstream.h>
    5   #include <rational.h>
    6   
    7   
    8   void main(void)
    9   {
   10      int Fd[2];
   11      pipe(Fd);
   12      ifstream In;
   13      ofstream Out;
   14      rational X(1,2);
   15      rational Y(3,7);
   16      rational Z;
   17      double U = 3.4;
   18      double Q;
   19      int Pid;
   20      Pid = fork();
   21      if(Pid == 0){
   22        close(Fd[1]);
   23        In.attach(Fd[0]);
   24        In >> Z >> Q;
   25        Z = Z + Y;
   26        In.close();
   27        cout << Z << " " << Q << endl;
   28      }
   29      else{
   30           close(Fd[0]);
   31           Out.attach(Fd[1]);
   32           Out << X << " " << U << endl;
   33           Out.close();
   34           
   35      }  
   36     
   37   }     
   38       
   39