怎么合理设计多重的分支语句

int swit()
{
    int p_index;
    int c_index;
    switch ( p_index )
    {
        case 1 :
            switch( c_index )
            {
                case 1 :
                    #.
                    break;
                case 2 :
                    #
                    break;
                case 3 :
                    #
                    break;
                case 4 :
                    #
                    break;
                default:
                    #
                    break;
            }
            break;
        case 2 :
            #
            break;
        case 3 :
            #
            break;
        case # :
            #
            break;        
        case # :
            #
            break;
        case # :
            #
            break;
        case # :
            #
            break;
        default:
            #
            break;
    }
}