Computer Science A - 11/22/99

{
    int sum = 0;

    for(int col = 0; col < M.NumCols; col++)
        sum += M.Entries[R][col];
    for(int row = 0; row < M.NumRows; row++)
        sum += M.Entries[row][C]
    sum -= M.Entries[R][C];

    return sum;
}