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Hi,

I'm designing a Matrix class so I read what Bjarne Stroustrup has on
section 22.4.6 about it. It shows that it is possible to eliminate the
temporaries by delaying the construction of the object. In his example
(page 675):

struct MVmul {
const Matrix& m;
const Vector& m;

MVmul(const Matrix& mm, const Vector& vv) : (mm), v(vv) { }
operator Vector(); // evaluate and return result
};

inline MVmul operator*(const Matrix& mm, const Vector& vv)
{
return MVmul(mm,vv);
}

Now, I think that's cool, however, I have a question about the
converting function operator Vector(). The implementation could be
done there OR it can be done as a constructor of the Vector class,
right? Something like this:

hi friends

I tried to link c++ object files using "bfin-elf-ld" and got some
undefined reference errors
Errors:::::
(.text+0x2ee8): undefined reference to `operator delete(void*)'
(.text+0x2ef4): undefined reference to `_Unwind_Resume'
(.text+0x2efa): undefined reference to `operator new(unsigned long)'
(.text+0x25f6): undefined reference to `__muldf3'
(.text+0x2620): undefined reference to `__floatsidf'

I dont know why its giving these errors..
Plz help me to fix this

thanks in advance

On Dec 4, 6:11 am, tushar.sax...@gmail.com wrote:

Could consider parser tools like lex, yacc, bison for decoding...

In the following code example, I define several Comparator classes
which contain different compare functions to use with std::sort. I
have a Sorter class that gets passed a Comparator and is supposed to
sort using the specific Comparator that's passed to it.

But it always uses the Comparator base class and not the derived class
that it is supposed to use, although the functions are virtual.

How can I make the code work? You might argue that a Sorter class is
not needed, but I want one because I have more data and operations
related to sorting that I would like to put there.

#include
#include

class Comparator {
public:
virtual bool operator() (const int& i1, const int& i2) const {
return i1 < i2;
}
};

For several days i've been unable to access

http:/msdn.microsoft.com

Receiving error :
http://msdn2.microsoft.com/Message-Error.htm?aspxerrorpath=/

Runtime Error
Description: An application error occurred on the server. The current
custom
error settings for this application prevent the details of the
application
error from being viewed remotely (for security reasons). It could,
however,
be viewed by browsers running on the local server machine.

Hello all,

I'm trying to write a function prototype that includes an array of
structures. I'm not sure how to write it. I'm also not sure what the call
to a function that uses this prototype would look like. From what i've read
on the web, it needs to be a pointer to an array. I'm not sure even where
to begin. I've written function protoypes for arrays and 2d arrays but when
I write it for the structure, i get compiler errors.

any help...

Thanks
Art

I have a mate who wants to share code that he compiled with msvc. I
want to add those files in a project in dev-c++ using the minGW
compiler. The project uses glui libs. I've set the project options
to point to the correct locations. Anyone with ideas on how to get
this to work, apart from downloading msvc?

I created global variable for pointer to function. Set_pf() function is
to copy Test() function into global variable of pf(). The main() function
starts before Set_pf() function is executed. The Pointer_To_Function
variable copied into pf variable without any problem. pf() function has
memory address to have a pointer to function of Test() function. The
problem is that when Set_pf() function is exited before pf variable is set
to zero automatically that it is not supposed to do. Then, pf() function
inside main() function attempts to execute before crash occured with illegal
memory. Is there a way to fix to prevent pf() variable to set zero
automatically? Here is my source code below.

void (*pf)(void);

void Test(void)

{

int a = 5;

}

void Set_pf(void (*Pointer_To_Function)(void))

{

void (*pf)(void) = Pointer_To_Function;

pf(); // Execute is fine.

Dear comp.lang.c++,

Could you make this snippet more efficient? As you see I have too many
variables introduced in the code.

//Read set of integers from a file on line by line basis in a STL set
//fp is pre-defined
for(;!fp.eof();)
{
string linestr;
getline(fp,linestr);
istringstream strstreamline(linestr);
istream_iterator intstream(strstreamline);
set pckset;
copy ( intstream , istream_iterator() ,
inserter(modpckset,modpckset.begin ( ) ));
}

Thanks in advance.