code đơn thức

Structure Don_Thuc
Dim iHeSo As Integer
Dim iSoMu As Integer
'bài 491: định nghĩa toán tử *
Shared Operator *(ByVal A As Don_Thuc, ByVal B As Don_Thuc) As Don_Thuc
Dim C As Don_Thuc
C.iHeSo = A.iHeSo * B.iHeSo
C.iSoMu = A.iSoMu + B.iSoMu
Return C
End Operator
'bài 492: định nghĩa toán tử /
Shared Operator /(ByVal A As Don_Thuc, ByVal B As Don_Thuc) As Don_Thuc
Dim C As Don_Thuc
C.iHeSo = A.iHeSo / B.iHeSo
C.iSoMu = A.iSoMu - B.iSoMu
Return C
End Operator
End Structure

Sub Nhap_Don_Thuc(ByRef A As Don_Thuc)
Console.Write("Nhap vao he so: ")
A.iHeSo = Console.ReadLine()
Console.Write("Nhap vao so mu: ")
A.iSoMu = Console.ReadLine()
End Sub
Sub Xuat_Don_Thuc(ByVal A As Don_Thuc)
Console.Write(vbCrLf & "Don thuc la: " & A.iHeSo & "x^" & A.iSoMu & vbCrLf)
End Sub
'bài 486: tính tích hai đơn thức
Function Tinh_Tich_Hai_Don_Thuc(ByVal A As Don_Thuc, ByVal B As Don_Thuc) As Don_Thuc
Dim C As Don_Thuc
C.iHeSo = A.iHeSo * B.iHeSo
C.iSoMu = A.iSoMu + B.iSoMu
Return C
End Function
'bai 487: tính đạo hàm đơn thức
Function Tinh_Dao_Ham_Don_Thuc(ByVal A As Don_Thuc) As Don_Thuc
Dim C As Don_Thuc
C.iHeSo = A.iHeSo * A.iSoMu
C.iSoMu = A.iSoMu - 1
Return C
End Function
'bài 488: tính thương hai đơn thức
Function Tinh_Thuong_Hai_Don_Thuc(ByVal A As Don_Thuc, ByVal B As Don_Thuc) As Don_Thuc
Dim C As Don_Thuc
C.iHeSo = A.iHeSo \ B.iHeSo
C.iSoMu = A.iSoMu - B.iSoMu
Return C
End Function
'bai 489: tính đạo hàm cấp k đơn thức
Function Tinh_Dao_Ham_Cap_K_Don_Thuc(ByVal A As Don_Thuc, ByVal k As Integer) As Don_Thuc
Dim i As Integer = 0
Dim C As Don_Thuc
While (i < k)
A.iHeSo = Tinh_Dao_Ham_Don_Thuc(A).iHeSo
A.iSoMu = Tinh_Dao_Ham_Don_Thuc(A).iSoMu
i = i + 1
End While
C.iHeSo = A.iHeSo
C.iSoMu = A.iSoMu
Return C
End Function
'bài 490: tính giá trị đơn thức tại x0
Function Tinh_Gia_Tri_Tai_X0(ByVal A As Don_Thuc, ByVal x0 As Integer) As Integer
Dim Ket_Qua As Integer = A.iHeSo * Math.Pow(x0, A.iSoMu)
Return Ket_Qua
End Function