Thread: recv() second arg

I dont know if it makes any sense but its kinda strange what i found.

From the client i send send(server, size, 8, 0); with the second arg: char* size.

On the server i recv(client, size, 8, 0); with the second arg: char size[8].

If i change the type to char* size on the server too, it stops working.

Its not that important but maybe someone had an idea why is that.

> If i change the type to char* size on the server too, it stops working.
You become responsible for making sure it points to allocated memory.

Thank you Salem!

So i guess it means i shouldnt use it if its not allocated.

By allocated i guess you mean, dynamically like that:

Code:

char* size = new char[8];

Unfortunately i have to use char* size because with char size[8] it wont compile on that line on the client side.

Code:

                     strcpy(Cmd, "Upload");
                     send(server, Cmd, 7, 0);
                     Sleep(5);
                     send(server, RemoteP, MAX_PATH, 0);
                     ifstream r(LocalP, ios::in | ios::binary);
                     // get size of file:
                     r.seekg (0, ios::end);
                     sz = r.tellg();
                     r.seekg (0, ios::beg);
                     // error: need char* for size
                     size = itoa(sz, buff, 10);
                     send(server, size, 8, 0);

                     char* Buffer = new char [sz];
                     ZeroMemory(Buffer, sz);
                     r.read(Buffer, sz);
                     send(server, Buffer, sz, 0);
                     cout << Buffer << endl;

                     r.close();
                     delete[] Buffer;

Try reading the manual page for itoa then.

Originally Posted by a man page

RETURN VALUES

The function itoa() always returns the value string. There is no error return.

Forget about size, just use buff

Thanks a lot, its working!