private void statement(){
        if( first(f_assignment) )
            assignment();
        else if( first(f_print) )
            print();
        else if( first(f_if) )
            ifproc();
        else if( first(f_while) )
            whileproc();
        else if( first(f_for) )
            forproc();
        else
            parse_error("oops -- statement bad first");
    }