加密:
Private Function JiaMi(ByVal varPass As String) As String '参数varPass是需要加密的文本内容
Dim varJiaMi As String * 20
Dim varTmp As Double
Dim strJiaMi As String
Dim I
For I = 1 To Len(varPass)
varTmp = AscW(Mid$(varPass, I, 1))
varJiaMi = Str$(((((varTmp * 1.5) / 5.6) * 2.7) * I))
strJiaMi = strJiaMi &varJiaMi
Next I
JiaMi = strJiaMi
End Function
解密函数:
Private Function JieMi(ByVal varPass As String) As String '参数varPass是需要解密的密文内容
Dim varReturn As String * 20
Dim varConvert As Double
Dim varFinalPass As String
Dim varKey As Integer
Dim varPasslenth As Long
varPasslenth = Len(varPass)
For I = 1 To varPasslenth / 20
varReturn = Mid(varPass, (I - 1) * 20 + 1, 20)
varConvert = Val(Trim(varReturn))
varConvert = ((((varConvert / 1.5) * 5.6) / 2.7) / I)
varFinalPass = varFinalPass &ChrW(Val(varConvert))
Next I
JieMi = varFinalPass
End Function
扩展资料:注意事项
编写加密程序,将用户输入的一个英文句子加密为加密字符串,然后输出加密字符串。假设句子长度不超过100个字符。
根据给定的句子加密函数原型SentenceEncoding,编写函数SentenceEncoding调用给定的字符加密函数CharEncoding完成句子加密。
然后,编写主程序提示用户输入英文句子,然后调用函数SentenceEncoding对句子加密,最后输出加密后的句子。
字符加密规则为大写字母和小写字母均加密为其补码, 我们定义ASCII码值相加为’A’+’Z’即155的两个大写字母互为补码,ASCII码值相加为’a’+’z’即219的两个小写字母互为补码。
空格用@代替,句号以#代替,其它字符用句点代替。
函数原型:
void SentenceEncoding(char *soure,char *code)
功能:对待加密字符串source加密后保存加密字符串到code.
参数:char *soure,指向待加密句子的字符串指针;
char *code 指向加密字符串的字符串指针;
字符加密函数代码。
'图上的控件,你就照着摆上去,然后再把以下代码拷进去,就OK了Dim lg As Integer
'加密
Private Sub Command1_Click()
Text2 = ""
Dim a(), b() As String
lg = Len(Text1)
ReDim a(lg), b(lg)
For i = 1 To lg
a(i) = Mid(Text1, i, 1)
b(i) = AscW(a(i)) Xor 4
Text2 = Text2 &ChrW(b(i))
Next
End Sub
'解密
Private Sub Command2_Click()
Text3 = ""
Dim a(), b() As String
lg = Len(Text2)
ReDim a(lg), b(lg)
For i = 1 To lg
a(i) = Mid(Text2, i, 1)
b(i) = AscW(a(i)) Xor 4
Text3 = Text3 &ChrW(b(i))
Next
End Sub
简单判断吧
a = "ABCD"'要加密的大写字母
For i = 1 To 4'循环
b = Asc(Mid(a, i, 1)) + 4'分离字符串为单个
If b >90 Then b = b - 26'如果大于90
Print Chr(b)'输出加密后字母
Next'循环结束
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