ABC与xyz进行2对2分组A不与X分在一c不和下，X,Z分在一组。

int main()/////////////////////////////////////////////
{
    char i, j, k;
    i = 'x';
    while (i <= 'z')
    {
        j++;
        j ='x';
        while (j <= 'z')
        {
            j++;
            k = 'z';
            while (k <= 'z')
            {
                k++;
                if (i != 'j' && i != 'k' && j != 'k')
                    if (i != 'x' && k != 'x' && k != 'z')
                        printf("A--%c,B--%c,C--%c", i, j, k);
            
            }
        
        }
        
    }
    return 0;
}