code phan so

by TranNgocSang 10/11/2009, 07:25

Structure Phan_So
Dim Tu_So As Integer
Dim Mau_So As Integer
''bài 516: định nghĩa toán tử +
Shared Operator +(ByVal A As Phan_So, ByVal B As Phan_So) As Phan_So
Dim C As Phan_So
If (A.Mau_So = B.Mau_So) Then
C.Tu_So = A.Tu_So + B.Tu_So
C.Mau_So = A.Mau_So
Else
C.Tu_So = A.Tu_So * B.Mau_So + B.Tu_So * A.Mau_So
C.Mau_So = A.Mau_So * B.Mau_So
End If
Return C
End Operator
'bài 517: định nghĩa toán tử -
Shared Operator -(ByVal A As Phan_So, ByVal B As Phan_So) As Phan_So
Dim C As Phan_So
If (A.Mau_So = B.Mau_So) Then
C.Tu_So = A.Tu_So - B.Tu_So
C.Mau_So = A.Mau_So
Else
C.Tu_So = A.Tu_So * B.Mau_So - B.Tu_So * A.Mau_So
C.Mau_So = A.Mau_So * B.Mau_So
End If
Return C
End Operator
'bài 518: định nghĩa toán tử *
Shared Operator *(ByVal A As Phan_So, ByVal B As Phan_So) As Phan_So
Dim C As Phan_So
C.Tu_So = A.Tu_So * B.Tu_So
C.Mau_So = A.Mau_So * B.Mau_So
Return C
End Operator

'bài 519: định nghĩa toán tử /
Shared Operator /(ByVal A As Phan_So, ByVal B As Phan_So) As Phan_So
Dim C As Phan_So
C.Tu_So = A.Tu_So * B.Mau_So
C.Mau_So = A.Mau_So * B.Tu_So
Return C
End Operator
Shared Operator -(ByVal A As Phan_So) As Phan_So

End Operator
End Structure
Sub Nhap_Phan_So(ByRef A As Phan_So)
Console.Write("Nhap vao tu so: ")
A.Tu_So = Console.ReadLine()
Console.Write("Nhap vao mau so: ")
A.Mau_So = Console.ReadLine()
End Sub
Sub Xuat_Phan_So(ByRef A As Phan_So)
Console.Write(vbCrLf & A.Tu_So & "/" & A.Mau_So & vbCrLf)
End Sub
Function TimUocLonNhat(ByVal A As Integer, ByVal B As Integer) As Integer
While (A * B <> 0)
If (A > B) Then
A = A - B
Else
B = B - A
End If
End While
Return A
End Function
'bài 506: Rút gọn phân số
Function Rut_Gon_Phan_So(ByVal A As Phan_So) As Phan_So
Dim C As Phan_So
C.Tu_So = A.Tu_So / TimUocLonNhat(A.Tu_So, A.Mau_So)
C.Mau_So = A.Mau_So / TimUocLonNhat(A.Tu_So, A.Mau_So)
Return C
End Function
'bài 507: tính tổng hai phân số
Function Tinh_Tong_hai_Phan_So(ByVal A As Phan_So, ByVal B As Phan_So)
Dim C As Phan_So = A + B
Return C
End Function
'bài 508: tính hiệu hai phân số
Function Tinh_Hieu_hai_Phan_So(ByVal A As Phan_So, ByVal B As Phan_So)
Dim C As Phan_So = A - B
Return C
End Function
'bài 509: tính tích hai phân số
Function Tinh_Tich_hai_Phan_So(ByVal A As Phan_So, ByVal B As Phan_So)
Dim C As Phan_So = A * B
Return C
End Function
'bài 510: tính thương hai phân số
Function Tinh_Thuong_hai_Phan_So(ByVal A As Phan_So, ByVal B As Phan_So)
Dim C As Phan_So = A / B
Return C
End Function
'bài 511: kiểm tra phân số tối giản
Function Kiem_Tra_Phan_So_Toi_Gian(ByVal A As Phan_So) As Boolean
Dim C As Phan_So = Rut_Gon_Phan_So(A)
If (A.Mau_So = C.Mau_So And A.Tu_So = C.Tu_So) Then
Return True
End If
Return False
End Function
'bài 512: quy đồng hai phân số
Sub Quy_Dong_Hai_Phan_So(ByVal A As Phan_So, ByVal B As Phan_So)
Dim C As Phan_So = A
A.Tu_So = A.Tu_So * B.Mau_So
A.Mau_So = A.Mau_So * B.Mau_So
B.Tu_So = B.Tu_So * C.Mau_So
B.Mau_So = B.Mau_So * C.Mau_So

Console.Write("Phan so da quy dong la: ")

Xuat_Phan_So(A)
Xuat_Phan_So(B)

End Sub

'bài 513: kiểm tra phân số dương
Function Kiem_Tra_Phan_So_Duong(ByVal A As Phan_So) As Boolean
If (A.Mau_So < 0 Or A.Tu_So < 0) Then
Return False
End If
Return True
End Function

'bài 514: kiểm tra phân số dương
Function Kiem_Tra_Phan_So_Am(ByVal A As Phan_So) As Boolean
If (A.Mau_So > 0 Or A.Tu_So > 0) Then
Return False
End If
Return True
End Function

'bài 515: so sánh hai phân số
Function So_Sanh_Hai_Phan_So(ByVal A As Phan_So, ByVal B As Phan_So) As Integer
Dim C As Phan_So = A
A.Tu_So = A.Tu_So * B.Mau_So
A.Mau_So = A.Mau_So * B.Mau_So
B.Tu_So = B.Tu_So * C.Mau_So
B.Mau_So = B.Mau_So * C.Mau_So
If (A.Tu_So < B.Tu_So) Then
Return -1
ElseIf (A.Tu_So = B.Tu_So) Then
Return 0
End If
Return 1
End Function