Problems - Correcting Logic and Code Errors

question 12

Essay

Problems - Correcting Logic and Code Errors
The following sample of code contains errors. Rewrite the incorrect statements to correct all errors.
Private Sub btnDisplay_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDisplay.Click
' displays type of vehicle for the code entered by user
Const strLENGTH_MSG As String = "The code must contain four characters."
Const strTYPE_MSG As String = "The last character in the code must be C, T, or V."
Dim strCode As String
Dim strLastChar As String
strCode = txtCode.Text.ToLower
' determine whether code contains exactly 4 characters
If strCode.Chars
lblType.Text = String.Empty
MessageBox.Show(strLENGTH_MSG, "Code",
MessageBoxButtons.OK,
MessageBoxIcon.Information)
Else
' determine whether the last character is valid
strLastChar = strCode.Substring(4)
Select Case strCode
Case "C"
lblType.Text = "Car"
Case "T"
lblType.Text = "Truck"
Case "V"
lblType.Text = "Van"
Case Else
lblType.Text = String.Empty
MessageBox.Show(strType_MSG, "Type",
MessageBoxButtons.OK,
MessageBoxIcon.Information)
End If
End If
End Sub

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Definitions:

Columnar Cells

Elongated epithelial cells resembling columns, often found lining the gut, respiratory tract, and glands, and involved in absorption, secretion, and protection.

Red Blood Cells

Red blood cells, also known as erythrocytes, are cells that carry oxygen from the lungs to body tissues and carbon dioxide back to the lungs for exhalation, crucial for maintaining life.

Sperm Cells

Male gametes responsible for fertilizing the female ovum, containing genetic material to be inherited by the offspring.

Macrophages

Big white blood cells belonging to the immune system, which consume and break down cellular waste, foreign materials, microorganisms, and cancer cells.