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Oct 9th, 2004
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unhandaled exception,0X000005:access violation

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Hi,
I get this message when the program shold exit the main function. I think that the problam could be in that function (that is being called from main):
void scanFileToMat( ifstream mFile,int arr[43][43])
{
string m ,s;
int pos;
double sign;
int col, value;
getline(mFile,m,')');
while(!mFile.eof())
{

mFile>>sign;
arr[numSV][42]=sign>0;
getline(mFile,m,'\n');

while(m.length())


{ pos=m.find_first_of(':');
s=m.substr(0,pos);
char *charArr=new char[pos+1];
for(int i=0;i<pos;i++)
charArr[i]=s[i];
col=atoi(charArr);
delete []charArr;
m=m.substr(pos+1);
pos=m.find_first_of(' ');
s=m.substr(0,pos);
char *charArr2=new char[pos+1];
for(i=0;i<pos;i++)
charArr2[i]=s[i];
value=atoi(charArr2);
delete []charArr2;
m=m.substr(pos+1);

arr[numSV][col]=value;
}



numSV++;
}

return;
}
But I cant see where!
Any help will make me happy

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michal is offline Offline
1 posts
since Oct 2004
Oct 9th, 2004
0

Re: unhandaled exception,0X000005:access violation

>But I cant see where!
That's because you're doing so much that could cause it! An access violation is when you access memory outside of your address space. This is most often caused by writing to uninitialized memory (through a pointer) or by overrunning the boundaries of an array (either statically or dynamically allocated).

If you don't have a good debugger, litter your code with debug statements that tell you exactly what the limits of your arrays are and what the values of the indices you're using are. Then print the value of your pointers to ensure that they're pointed where you want them to be, and pay careful attention to your dynamic allocation. An off-by-one error there will usually show up when the memory is reclaimed. The memory manager is a fragile beast and you must be especially careful.
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Narue is offline Offline
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since Sep 2004

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.
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