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Re:
- To: gnu-win32 at cygnus dot com
- Subject: Re:
- From: Benjamin Riefenstahl <benny at crocodial dot de>
- Date: Tue, 24 Nov 1998 22:17:09 +0100
- Organization: Crocodial Communications EntwicklungsGmbH
- References: <199811232132.WAA00238@dedalus.com>
Hi Ugo,
Ugo Matrangolo wrote:
> This program causes a segment violation :
> ...
> vector<vector<int> > mymatrix(n);
>
> for (int i = 0;i < n;i++)
> for (int j = 0;j < n;j++)
> mymatrix[i][j] = 0;
> ...
> Can anyone tell me if it is a bug or my fault ?
Your fault ;-)
The declaration allocates a vector of n *empty* vector<int>s and those
inner vectors are never expanded to make room for any elements (vectors
do not expand automatically). Try this one instead:
vector<vector<int> > mymatrix(n);
for (int i = 0;i < n;i++)
for (int j = 0;j < n;j++)
mymatrix[i].push_back(0); // expand the vector<int> by one
so long, benny
======================================
Benjamin Riefenstahl (benny@crocodial.de)
Crocodial Communications EntwicklungsGmbH
Ruhrstr. 61, D-22761 Hamburg, Germany
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