delete []array problems (program crashes)

[ahmad]

Hi,

I am having trouble finding the root of this problem. My program gives
me a debugg error - I am using VC++ 6.0 - on this line delete []array,
and I would appreciate if you could provide some help.

here is the code...


Note: N=4

for(_rows=0;_ro ws<N;_rows++)
{

double** manor=new double*[N-1];

for(i=0;i<N;i++ )
*(i+manor)=new double[N-1];

// loops to copy manor

for(rows=1;rows <N;rows++)
{

int _columns=0;
for(int columns=0;colum ns<N;columns++)
{

if(columns==_ro ws)
continue;
manor[rows-1][_columns]=m[rows][columns];
_columns++;

}

}

// code works up to this point
// Now I want to free the allocated memory

for(i=0;i<N-1;i++)
delete manor[i];

delete []manor; // it crashes on this line. I don't understand why?
Thanks in advance,

Ahmad

[Gernot Frisch]

Re: delete []array problems (program crashes)


"ahmad" <moatesim@gmail .com> schrieb im Newsbeitrag
news:1105517728 .020441.226480@ f14g2000cwb.goo glegroups.com.. .[color=blue]
> Hi,
>
> I am having trouble finding the root of this problem. My program
> gives
> me a debugg error - I am using VC++ 6.0 - on this line delete
> []array,
> and I would appreciate if you could provide some help.
>
> here is the code...
>
>
> Note: N=4
>
> for(_rows=0;_ro ws<N;_rows++)
> {
>
> double** manor=new double*[N-1];[/color]

manor can hold 3 double* now.
[color=blue]
>
> for(i=0;i<N;i++ )
> *(i+manor)=new double[N-1];[/color]

for i=0; 1, 2, 3 -> that's 4 double*'s now. You're accessing memory
beyond allocation.
And that will yield at delete[] command.
-Gernot