free(): invalid pointer

c language

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,

Jun 14 '06 #1

Subscribe Post Reply

4307

Ian Collins

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.

Jun 14 '06 #2

Robert Gamble

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

Jun 14 '06 #3

seni.yin

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

Jun 14 '06 #4

Michael Mair

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.

Jun 14 '06 #5

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