如何计算Visual Basic中的用户输入？

Question

VB的代码：

For 'I think this where the counter would go if I knew how to write it
        If (intEmpCount < 10) Then
            If decTotalTax < decGrossPay Then
                decNetPay = decNetPay
                boxResults.Items.Add("EMPLOYEE ID: " & dblEmpID.ToString)
                boxResults.Items.Add("Gross Pay: $" & decGrossPay.ToString("N2"))
                boxResults.Items.Add("Net Pay: $" & decNetPay.ToString("N2"))
                boxResults.Items.Add("State Withholdings: $" & decStateTaxAmount.ToString("N2"))
                boxResults.Items.Add("Federal Withholdings: $" & decFederalTaxAmount.ToString("N2"))
                boxResults.Items.Add("FICA Withholdings: $" & decFICAAmount.ToString("N2"))
            Else
                MessageBox.Show("ERROR. THE AMOUNT OF WITHOLDINGS ($" & decTotalTax.ToString("N2") & ") EXCEEDS THE GROSS PAY.")
            End If
        Else
            MessageBox.Show("ERROR. YOU HAVE EXCEEDED THE ALLOWABLE NUMBER OF EMPLOYEES.")
        End if

需要回答的问题是：如何计算已输入的EmployeeID数量？

对于这项任务，我假设教授希望我们将员工人数限制在10人，所以我想弄清楚如何做到这一点。同样，出于此分配的目的，我们应该假设EmployeeID可以是长度为六位或七位的任何数字，具体取决于公司的规模。

例如：1000 10001 100001 101000等...

Answer 1

这是Visual Basic中for循环的一般语法：

For counter [ As datatype ] = start To end [ Step step ]  
    [ statements ]  
    [ Continue For ]  
    [ statements ]  
    [ Exit For ]  
    [ statements ]  
Next [ counter ]

所以你的循环可能看起来像

For number As Integer = 0 To 5
            (something here)
        Next
        (something here)

所以这意味着我们最初声明一个名为number的整数= 0。它将一直持续到达到5.你会写类似的东西，但你必须弄清楚循环结束时的条件（例如你的可能是10）。我还没有用VB编写一段时间，但我主要做的是C＃，它有点类似。您的代码可能如下所示：

    For k As Integer = 0 To 5
            If (intEmpCount < 10) Then
                If decTotalTax < decGrossPay Then
                    decNetPay = decNetPay
                    boxResults.Items.Add("EMPLOYEE ID: " & dblEmpID.ToString)
                    boxResults.Items.Add("Gross Pay: $" & decGrossPay.ToString("N2"))
                    boxResults.Items.Add("Net Pay: $" & decNetPay.ToString("N2"))
                    boxResults.Items.Add("State Withholdings: $" & decStateTaxAmount.ToString("N2"))
                    boxResults.Items.Add("Federal Withholdings: $" & decFederalTaxAmount.ToString("N2"))
                    boxResults.Items.Add("FICA Withholdings: $" & decFICAAmount.ToString("N2"))
                Else
                    MessageBox.Show("ERROR. THE AMOUNT OF WITHOLDINGS ($" & decTotalTax.ToString("N2") & ") EXCEEDS THE GROSS PAY.")
                End If
            Else
                MessageBox.Show("ERROR. YOU HAVE EXCEEDED THE ALLOWABLE NUMBER OF EMPLOYEES.")
            End if
Next

另外

如果你愿意，你可以在for循环之前创建一个整数变量，每次迭代加上+1。所以你可能会尝试这样的事情：

Dim k As Integer = 0
    For 'I think this where the counter would go if I knew how to write it
            If (intEmpCount < 10) Then
                If decTotalTax < decGrossPay Then
                    decNetPay = decNetPay
                    boxResults.Items.Add("EMPLOYEE ID: " & dblEmpID.ToString)
                    boxResults.Items.Add("Gross Pay: $" & decGrossPay.ToString("N2"))
                    boxResults.Items.Add("Net Pay: $" & decNetPay.ToString("N2"))
                    boxResults.Items.Add("State Withholdings: $" & decStateTaxAmount.ToString("N2"))
                    boxResults.Items.Add("Federal Withholdings: $" & decFederalTaxAmount.ToString("N2"))
                    boxResults.Items.Add("FICA Withholdings: $" & decFICAAmount.ToString("N2"))
                    k += 1
                Else
                    MessageBox.Show("ERROR. THE AMOUNT OF WITHOLDINGS ($" & decTotalTax.ToString("N2") & ") EXCEEDS THE GROSS PAY.")
                End If
            Else
                MessageBox.Show("ERROR. YOU HAVE EXCEEDED THE ALLOWABLE NUMBER OF EMPLOYEES.")
            End if

然后整数k显然是你做任何事情的价值。如果不是这样，它肯定会非常相似。