Question

VB算法：从字母数字组成的字符串中找出所有大写字母，并逆序输出。 越简单越好。

Answer 1

假设你的字符串已经在变量s里面了：

Sub 按字符逆序输出大写字母()
    Dim i As Integer, s As String
    Dim x As Integer, c As String
    Dim arr(1 To 26) As Integer
    s = InputBox("输入字符串")
    For i = 1 To 26
        arr(i) = 0
    Next i
    For i = 1 To Len(s)
        c = Mid(s, i, 1)
        If c >= "A" And c <= "Z" Then
            x = Asc(c) - Asc("A") + 1
            arr(x) = arr(x) + 1
        End If
    Next i
    c = ""
    For i = 26 To 1 Step -1
        If arr(i) > 0 Then c = c & Chr(Asc("A") + i - 1)
    Next i
    MsgBox "你的字符串中出现的大写字母有：" & c
End Sub

Answer 2

这就是最简单的方式

Private Sub Form_Load()
a = "a23BaC32D*weEF"
For i = Len(a) To 1 Step -1
stra = Mid(a, i, 1)
If stra <= "Z" And stra >= "A" Then aa = aa & stra
Next
MsgBox aa
End Sub

追问

呃……仅仅是算法就这么多么？

追答

是啊 从最后一个开始读 ，满足条件就保留，最后倒序输出

Answer 3

假设你的字符串已经在变量s里面了：

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Sub 按字符逆序输出大写字母()
Dim i As Integer, s As String
Dim x As Integer, c As String
Dim arr(1 To 26) As Integer
s = InputBox("输入字符串")
For i = 1 To 26
arr(i) = 0
<a href="https://www.baidu.com/s?wd=Next&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLPhRznAfvPHuhPyDkm1RY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1D1PWT3rjTdrH6znHm3nHTsnHb" target="_blank" class="baidu-highlight">Next</a> i
For i = 1 To Len(s)
c = Mid(s, i, 1)
If c >= "A" And c <= "Z" Then
x = Asc(c) - Asc("A") + 1
arr(x) = arr(x) + 1
End If
<a href="https://www.baidu.com/s?wd=Next&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLPhRznAfvPHuhPyDkm1RY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1D1PWT3rjTdrH6znHm3nHTsnHb" target="_blank" class="baidu-highlight">Next</a> i
c = ""
For i = 26 To 1 Step -1
If arr(i) > 0 Then c = c & Chr(Asc("A") + i - 1)
<a href="https://www.baidu.com/s?wd=Next&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLPhRznAfvPHuhPyDkm1RY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1D1PWT3rjTdrH6znHm3nHTsnHb" target="_blank" class="baidu-highlight">Next</a> i
MsgBox "你的字符串中出现的大写字母有：" & c
End Sub

Answer 4

Private Sub Command1_Click()
Dim s As String, t As String
Dim slen As Integer
s = InputBox("请输入串")
slen = Len(s)
For i = 1 To slen
m = Mid(s, i, 1)
If m >= "A" And m <= "Z" Then t = m & t
Next
Print t
End Sub