循环相加即可
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Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim sum As Double = 0
For i = 0 To ListView1.Items.Count - 1 '
sum += Val(ListView1.Items(i).SubItems(2).Text)
Next
MsgBox("消费金额：" sum)
End Sub
Private Sub Command1_Click()
MsgBox CalcResult(2)
End Sub
Public Function CalcResult(X As Long) As Double
Dim dblMinLevel As Double
Dim dblItem As Double
Dim dblN As Double
Dim dblMember As Double, dblBase As Double
Dim i As Double
Dim dblResult As Double
dblMinLevel = 10 ^ (-6)
dblN = 0
Do
dblMember = X ^ dblN
dblBase = 1
i = dblN
Do While i 1
dblBase = dblBase * i
i = i - 1
Loop
dblItem = dblMember / dblBase
dblResult = dblResult + dblItem
dblN = dblN + 1
Loop While dblItem = dblMinLevel
CalcResult = dblResult
End Function
String[] s={"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
System.out.print("请输入数字（1-12）：");
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String str=br.readLine();
int m=Integer.parseInt(str);
if (m=0||m=13)
{
lblresult是一个label控件，确定你的设计界面加入了一个label控件并将其命名为lblresult
dim a as singer
dim b as singer 定义a，b 为单精度型
a=text1.text 将输入文本框1的赋给A 我看不懂textbox是什么 不好意思
b=text2.text 将输入文本框2的赋给b
text3.text=a+b 讲a+b的值赋给text3.text
应该就是这样 我的QQ是349141013 我正在学习VB中 希望可以和你交流
Dim textColumn As New DataGridViewTextBoxColumn() '定义一个新的textbox格式的列
textColumn.Name = "Column1" '定义该列的Name
textColumn.HeaderText = "Column1" '定义该列的标题
DataGridView1.Columns.Add(textColumn)
For Each r As DataGridViewRow In DataGridView1.Rows '循环DataGridView的行
r.Cells(textColumn.Index).Value = r.Cells(0).Value + r.Cells(1).Value '将第一列和第二列单元格数据相加，并显示在新添加的单元格上
Next