Pointer structures in Borland C++

What are the errors that you are getting?

You're not getting type mismatch errors are you? I dont know if this'll help, but heres some documentation for that function:

Syntax
istream& read(char*, int);
istream& read(signed char*, int);
istream& read(unsigned char*, int);

Description

The read member function extracts a given number of characters into an array. Use gcount() for the number of characters actually extracted if an error occurred.

It gives the following error:
Can not find a match for
fstream::read(STRUCT*,unsigned int)

And there is just no way to convert the STRUCT* to a void* or char*.

What happens if you use (char*)(&struct)? I don't see any reason why this wouldn't work, unless I'm missing something here...

Good luck

Starfall

Starfall is 100% correct. What do you mean there is NO WAY to convert struct* to void* or char*...ALL pointers can be cast to ALL other pointers....it's just part of C....assuming your not in a system with near and far pointers

you just say this:
if( file.read((char*)&myStruct,sizeof(STRUCT)) != sizeof(STRUCT) )
// then you had an error

good luck

Thanx for all your replies.
And the solution was JUST the thing that I haven't thought about. You see: the solution is in the place where you least expected.
I had tried things like:

char *ptr;
MYSTRUCT mstruct;

ptr=&mstruct

That wouldn't work. But type casting does work.

You may also want to investigate

code:

---

reinterpret_cast (var_struct)

---

, as I've heard it provides a safer way to cast un-related types (in your case your struct type).

[This message has been edited by joeG (edited December 19, 1999).]

char *ptr;
MYSTRUCT mstruct;

ptr=&mstruct

This should also work, if you want to do it this way - just use:

ptr = (char*)&mstruct

Regards

Starfall