Re: cannot compile example 1-1 of "More Exceptional C++"

Below is the example 1-1 of "More Exceptional C++":

#include <fstream>
#include <iostream>
using namespace std;

int main( int argc, char **argv )
{
    (argc > 2 ? ofstream( argv[2], ios_base::binary | ios_base::out ) :
cout )
    <<
    (argc > 1 ? ifstream( argv[1], ios_base::binary | ios_base::in ) :
cin ).rdbuf() ;

    return 0 ;
}

When compiling the program above,BCC55 reports:
Error E2125 echo.cpp 7: Compiler could not generate copy constructor
for class '
ostream' in function main(int,char * *)
Error E2125 echo.cpp 9: Compiler could not generate copy constructor
for class '
istream' in function main(int,char * *)

Why does it need to generate copy constructor for class 'ostream' and
'istream'?