int getline(char table[][8], char col, int row, int dc, int dr, char line[])
{
    char c=col;
    int i,j,k=0;
    i=row-1;
    j=(int)(c)-97;
    i+=dr;
    j+=dc;
    while(((i<=7)&&(i>=0))&&((j<=7)&&(j>=0)))
    {
        line[k]=table[i][j];
        i+=dr;
        j+=dc;
        k++;
    }
    return k;
}