«

Hi All,

I have written a C++ program, it can be compiled (in UNIX) but when I
run it, I usually gives the following errors:

free(): invalid pointer 0x51d4a0!
free(): invalid pointer 0x51d460!
free(): invalid pointer 0x51d760!
free(): invalid pointer 0x51d7e0!
..
..
..

Can anyone help me to know what is the reason for this problem?

Thanks,

c language wrote:
> Hi All,
>
> I have written a C++ program,

Then you should go down the hall to the C++ group.

> it can be compiled (in UNIX) but when I
> run it, I usually gives the following errors:
>
> free(): invalid pointer 0x51d4a0!
> free(): invalid pointer 0x51d460!
> free(): invalid pointer 0x51d760!
> free(): invalid pointer 0x51d7e0!
> ..
> ..
> ..
>
> Can anyone help me to know what is the reason for this problem?
>
Passing an invalid pointer to free? When you post on the C++ group,
include the code.

--
Ian Collins.

c language wrote:
> Hi All,
>
> I have written a C++ program, it can be compiled (in UNIX) but when I
> run it, I usually gives the following errors:
>
> free(): invalid pointer 0x51d4a0!
> free(): invalid pointer 0x51d460!
> free(): invalid pointer 0x51d760!
> free(): invalid pointer 0x51d7e0!
>
> Can anyone help me to know what is the reason for this problem?

Why don't you try posting your question, along with a small, complete,
compilable example that demonstrates your issue, to comp.lang.c++. It
is very difficult to know exactly what the problem is without seeing
your code although, and I am going out on a limb here, you may be
trying to free an invalid pointer (i.e. a pointer that was not returned
to you by malloc and friends).

Robert Gamble

make sure the memory your pointer point to is allocated by fuction
"malloc"!

seni.yin schrieb:
> make sure the memory your pointer point to is allocated by fuction
> "malloc"!

What are you responding to? Please quote sufficient context.
The above may be right or wrong, depending on the context.

Cheers
Michael
--
E-Mail: Mine is an /at/ gmx /dot/ de address.