无法解决警告 C6386

Question

Please guys I need some help. I get Warning C6386 Buffer overrun while writing to 'AnArray': the writable size is 'nrows*8' bytes, but '16' bytes might be written. on the following code

#include <math.h>

void SubMain(int, int);
int CSTEBit(int, int, int);
double Fact(int);
double Perm(int, int);
int Comb(int, int);

int main()
{
    SubMain(13, 5);
}

void SubMain(int N, int R)
{
    int** AnArray;
    int nrows = Comb(N, R) + 1;
    int ncolumns = 8;
    int Pos;
    int Count;

    AnArray = new int* [nrows];
    for (int i = 0; i < nrows; i++)
        AnArray[i] = new int[ncolumns];

    for (int a = 0; a < nrows; a++)
    {
        for (int b = 0; b <= 7; b++)
            AnArray[a][b] = 0;
    }


    Pos = 0;
    Count = 0;
    do
    {
        Pos += 1;
        if ((CSTEBit(3, AnArray[Pos][7], 4) == 0) && (CSTEBit(3, AnArray[Pos][7], 5) == 0))
            Count += 1;
    } while (Count != nrows - 1);
    AnArray[Pos][7] = CSTEBit(1, AnArray[Pos][7], 4);
}

int CSTEBit(int CSTE, int Byt, int Bit)
{
    int tempCSTEBit = 0;
    if (Bit < 8)
    {

        int Mask = (int)pow(2, Bit);

        switch (CSTE)
        {
        case 0:
            tempCSTEBit = (int)(Byt && ~Mask);
            break;

        case 1:
            tempCSTEBit = (int)(Byt | Mask);
            break;

        case 2:
            tempCSTEBit = (int)(Byt ^ Mask);
            break;

        case 3:
            if ((Byt & Mask) > 0)
            {
                tempCSTEBit = 1;
            }
            else
            {
                tempCSTEBit = 0;
            }

            break;

        default:
            tempCSTEBit = Byt;
            break;
        }

    }
    else
    {
        tempCSTEBit = Byt;

    }
    return tempCSTEBit;
}

double Fact(int N)
{
    double tempFact = 0;
    if (N <= 1)
    {
        tempFact = 1;
    }
    else
    {
        tempFact = N * Fact(N - 1);
    }
    return tempFact;
}

double Perm(int N, int R)
{
    double tempPerm = 0;
    int a = 0;
    double b;
    b = 1;
    if (N < R)
    {
        tempPerm = 0;
    }
    else
    {
        for (a = (N - (R - 1)); a <= N; a++)
        {
            b = b * a;
        }
        tempPerm = b;
    }
    return tempPerm;
}

int Comb(int N, int R)
{
    int tempComb = 0;
    if (N < R)
    {
        tempComb = 0;
    }
    else
    {
        tempComb = (int)(Perm(N, R) / Fact(R));
    }
    return tempComb;
}

The variable Pos will never be higher than what Comb function returns which is used to initialize the AnArray. Thanks in advance for any answer.

Answer 1

Well actually I insert "if (Pos < nrows)" inside the do loop after Pos += 1; and the warning was gone.