Private Sub Command1_Click()
    'PROGRAM D7R10
    'Driver for routine ECLASS
    N = 15: M = 11
    Dim LISTA(11), LISTB(11), NF(15), NFLAG(15), NSAV(15)
    LISTA(1) = 1: LISTA(2) = 1: LISTA(3) = 5:  LISTA(4) = 2: LISTA(5) = 6
    LISTA(6) = 2: LISTA(7) = 7: LISTA(8) = 11: LISTA(9) = 3: LISTA(10) = 4
    LISTA(11) = 12
    LISTB(1) = 5:  LISTB(2) = 9: LISTB(3) = 13: LISTB(4) = 6:  LISTB(5) = 10
    LISTB(6) = 14: LISTB(7) = 3: LISTB(8) = 7:  LISTB(9) = 15: LISTB(10) = 8
    LISTB(11) = 4
    Call ECLASS(NF(), N, LISTA(), LISTB(), M)
    Print "NF(I)=, (I=1,N)"
    For I = 1 To N
        Print Tab(1 + (I - 1) * 4); NF(I);
    Next I
    Print
    For I = 1 To N
        NFLAG(I) = 1
    Next I
    Print
    Print "Numbers from 1-15 divided according to"
    Print
    Print "their value modulo 4:"
    Print
    LCLAS = 0
    For I = 1 To N
        NCLASS = NF(I)
        If NFLAG(NCLASS) <> 0 Then
            NFLAG(NCLASS) = 0
            LCLAS = LCLAS + 1
            K = 0
            For J = 1 To N
                If NF(J) = NF(I) Then
                    K = K + 1
                    NSAV(K) = J
                End If
            Next J
            Print "Class"; LCLAS; ":  ";
            For J = 1 To K
                Print Format$(NSAV(J), "##0"); "  ";
            Next J
            Print
        End If
    Next I
End Sub