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From: joe on 24 Jun 2008 22:33
I am reading the "C++ Primer, 4th Edition". I compiled the following
codes,

// C-style character string implementation
const char *pc = "a very long literal string";
const size_t len = strlen(pc +1); // space to
allocate

// performance test on string allocation and copy
for (size_t ix = 0; ix != 1000000; ++ix)
{
char *pc2 = new char[len + 1]; // allocate the space
strcpy(pc2, pc); // do the copy
if (strcmp(pc2, pc)) // use the new string
; // do nothing
delete [] pc2; // free the memory
}

I got an error message "Heap corruption detected: ... CRT detected
that the application wrote to memory after end of heap buffer.", so i
debugged it step by step and found that "delete [] pc2;" causes this
error. I wonder why and how to correct it.

Thanks
From: Andrew Koenig on 24 Jun 2008 22:48
"joe" <liuj0025(a)gmail.com> wrote in message
news:b32b7666-5e2b-4d89-9d57-0973e6886bda(a)r37g2000prm.googlegroups.com...

> const char *pc = "a very long literal string";
> const size_t len = strlen(pc +1);

This looks odd. Are you sure you didn't mean

const size_t len = strlen(pc) + 1;

??


From: joe on 24 Jun 2008 23:33
On Jun 25, 10:48 am, "Andrew Koenig" <a...(a)acm.org> wrote:
> "joe" <liuj0...(a)gmail.com> wrote in message
>
> news:b32b7666-5e2b-4d89-9d57-0973e6886bda(a)r37g2000prm.googlegroups.com...
>
> >             const char *pc = "a very long literal string";
> >             const size_t len = strlen(pc +1);
>
> This looks odd.  Are  you sure you didn't mean
>
>         const size_t len = strlen(pc) + 1;
>
> ??

> Thank you for your help. I copied the codes from the ebook edition, did not find this mistake.
> I think i should check it carefully.
> Thank you.
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