使用1个文本框和1个按钮查找用户输入的5个数字的总和 [英] Find the sum of 5 numbers entered by the user with 1 textbox and 1 button

问题描述

我需要找到5个总和。用户输入，只有1个文本框和1个按钮，每次输入一个否。在文本框中，我也单击按钮，然后清除文本框并重复该过程，直到我输入5个，第5个和最后一次单击按钮，msgbox将显示5个总和。由用户输入，并且将无法输入另一个号码。因为文本框不可见，因为限制只达到5次，这个问题的vb .net代码是什么？使用if-then条件语句和/或while循环。



我尝试过：



Dim s，i，n As Integer

s = 0

i = 0

n = TextBox1.Text



如果我< 5然后

i = i + 1

sum = sum + n

Msgbox（总和是：& sum）

结束如果



结束次级

结束班级



但它并没有真正起作用。不完整。

I need to find the sum of 5 nos. entered by the user, with only 1 textbox and 1 button, everytime I input a no. in the textbox, I also click the button, then clear the textbox and repeat the process until I have input 5 nos, the 5th and last time I clicked the button, the msgbox will show the sum of 5 nos. entered by the user, and will not be able to input another no. because the textbox will not be visible because the limit is reached only until 5 times, what is the vb .net code for this problem? Using if-then conditional statements and/or while loop only.

What I have tried:

Dim s, i, n As Integer
s = 0
i = 0
n = TextBox1.Text

If i < 5 Then
i = i + 1
sum = sum + n
Msgbox("The sum is : " & sum)
End If

End Sub
End Class

But its not really working. Incomplete.

推荐答案

以下是基于所列要求的工作示例。请注意，我给控件和变量的名称使代码非常容易阅读。

Below is a working example based on the requirements outlined. Notice that the names that I give controls and variables make the code very easy to read.

Public Class Form1

    Private Total As Integer
    Private Count As Integer
    Private MaxEntries As Integer = 5

    Private Sub ButAdd_Click(sender As Object, e As EventArgs) Handles ButAdd.Click

        If String.IsNullOrEmpty(txtInput.Text.Trim) Then Return

        Dim Value As Integer

        If Integer.TryParse(txtInput.Text, Value) Then

            If Count < MaxEntries Then
                Count += 1
                Total += Value
                labTotal.Text = Total.ToString
            Else
                txtInput.Enabled = False
            End If

        End If

        txtInput.ResetText()
        txtInput.Select()

    End Sub

End Class

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