FWIW
Array( const Array&rhs );
On Fri, Jun 10, 2011 at 08:30:05PM -0700, eric wrote:
> Dear Mr. Bjarne Stroustrup:
>
> Thanks your suggestion, I follow it but it show fatal error:Array.cpp:
> no such file
> so
> I add #include "Array.cpp" in my main program, pg52.cpp
> then
> it can compile
> but
> when I run it, it response
> Segmentation fault
>
> again it's g++ 4.5.2. What may cause wrong?
>
> hope to see your suggestion/advice again, and thanks a lot in advance,
> Eric
> -----------------------------------------------------
>
> On Fri, 2011-06-10 at 22:18 -0400, bs wrote:
> > On 6/10/2011 9:43 PM, eric wrote:
> > > Dear Bjarne Stroustrup:
> > >
> > > I copied a piece of codes from book(C++ primer 3rd Ed) chapter 2 about
> > > page 52.
> > > but it failed to be compiled under my g++ 4.5.2
> > > here is the program
> >
> > That book is an antique, but I think that the problem may simply be that
> > you can't separately compile pg52.cpp and Array.cpp. Try
> > #include<Array.cpp> in Array.h .
> >
> > > -----------------------
> > >
> > > eric@eric-laptop:~/CppPrimer3$ g++ Array.cpp pg52.cpp
> > > /tmp/ccE9MPMg.o: In function `main':
> > > pg52.cpp:(.text+0x23): undefined reference to `Array<int>::Array(int)'
> > > pg52.cpp:(.text+0x37): undefined reference to
> > > `Array<double>::Array(int)'
> > > pg52.cpp:(.text+0x4b): undefined reference to `Array<char>::Array(int)'
> > > collect2: ld returned 1 exit status
> > > --------------------------------------------------
> > > #include<iostream>
> > > #include "Array.h"
> > >
> > >
> > >
> > > int main() {
> > > const int array_size = 4;
> > >
> > > // elemType becomes int
> > > Array<int> ia(array_size);
> > >
> > > // elemType becomes double
> > > Array<double> da(array_size);
> > >
> > > // elemType becomes char
> > > Array<char> ca(array_size);
> > >
> > > int ix;
> > >
> > > for ( ix = 0; ix< array_size; ++ix ) {
> > > ia[ix] = ix;
> > > da[ix] = ix * 1.75;
> > > ca[ix] = ix + 'a';
> > > }
> > >
> > > for ( ix = 0; ix< array_size; ++ix )
> > > std::cout<< "[ "<< ix<< " ] ia: "<< ia[ix]
> > > << "\tca: "<< ca[ix]
> > > << "\tda: "<< da[ix]<< std::endl;
> > >
> > > return 0;
> > > }
> > > -------------------
> > > // Array.cpp
> > >
> > > #include "Array.h"
> > >
> > > /*
> > > Array::Array(elemType *iarray, int iarray_size)
> > > {
> > > ia = iarray;
> > > _size = iarray_size;
> > > }
> > > */
> > >
> > > template<class T> Array<T>::Array(const Array<T> &rhs )
> > > {
> > > ia = rhs;
> > > }
> > >
> > > template<class T> Array<T>::Array(const int size )
> > > {
> > > _size = size;
> > > }
> > >
> > >
> > > ------------------------------------------------------
> > > #ifndef Array_H
> > > #define Array_H
> > >
> > >
> > > template< class elemType>
> > > class Array {
> > > public:
> > > // parameterize element type
> > > explicit Array( int size = DefaultArraySize );
> > > Array( elemType *array, int array_size );
> > > Array( const Array&rhs );
> > >
> > > virtual ~Array() { delete [] ia; }
> > >
> > > bool operator==( const Array& ) const;
> > > bool operator!=( const Array& ) const;
> > >
> > > Array& operator=( const Array& );
> > > int size() const { return _size; }
> > >
> > > /* virtual */ elemType& operator[](int index){ return ia[index]; }
> > > /*
> > > virtual void sort();
> > >
> > > virtual elemType min() const;
> > > virtual elemType max() const; */
> > > /* virtual */ int find( const elemType&value ) const;
> > >
> > > protected:
> > > static const int DefaultArraySize = 12;
> > >
> > > int _size;
> > > elemType *ia;
> > > };
> > >
> > > #endif
> > > ---------------------------------------------------------------
> > > I asked mailing list in gcc, but so far I did not get any useful
> > > response. I know the book's author Stanley B. Lippman or Josee Lajoie
> > > ever work with you. And I tried to reach Stanley B. Lippman, I can not
> > > find his email addreess. I emailed Josee Lajoie but again never get any
> > > message from her (for 2 or 3 days).
> > > hope to get your help on this problem.
> > > Thanks your efforts a lot in advance
> > > Eric
> > >
> > >
> >
>
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