谁给我一个让网站实现更换主题的方案
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篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了谁给我一个让网站实现更换主题的方案相关的知识，希望对你有一定的参考价值。
自己开发网站，想让大部分代码不改变，通过更换主题文件的办法，来实现更换网站主题。
各位给个方案呗。
这样改主题，很单调的，我是想主题改变后，整个布局都跟着改变，如何实现？
方案二：做几套风格不一的样式表，替换样式表即可。
方案三：方案一 + 方案二。
这都不用改代码。
谁给我个md5等加密算法c++的现成类
谢谢 给一个加密算法给20分!谢谢啦 最好能执行的- -``
谢谢大家 我自己解决了`
Private Const BITS_TO_A_BYTE = 8
Private Const BYTES_TO_A_WORD = 4
Private Const BITS_TO_A_WORD = 32
Private m_lOnBits(30)
Private m_l2Power(30)
Private Function LShift(lValue, iShiftBits)
If iShiftBits = 0 Then
LShift = lValue
Exit Function
ElseIf iShiftBits = 31 Then
If lValue And 1 Then
LShift = &H80000000
Else
LShift = 0
End If
Exit Function
ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
Err.Raise 6
End If
If (lValue And m_l2Power(31 - iShiftBits)) Then
LShift = ((lValue And m_lOnBits(31 - (iShiftBits + 1))) * m_l2Power(iShiftBits)) Or &H80000000
Else
LShift = ((lValue And m_lOnBits(31 - iShiftBits)) * m_l2Power(iShiftBits))
End If
End Function
Private Function RShift(lValue, iShiftBits)
If iShiftBits = 0 Then
RShift = lValue
Exit Function
ElseIf iShiftBits = 31 Then
If lValue And &H80000000 Then
RShift = 1
Else
RShift = 0
End If
Exit Function
ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
Err.Raise 6
End If
RShift = (lValue And &H7FFFFFFE) \ m_l2Power(iShiftBits)
If (lValue And &H80000000) Then
RShift = (RShift Or (&H40000000 \ m_l2Power(iShiftBits - 1)))
End If
End Function
Private Function RotateLeft(lValue, iShiftBits)
RotateLeft = LShift(lValue, iShiftBits) Or RShift(lValue, (32 - iShiftBits))
End Function
Private Function AddUnsigned(lX, lY)
Dim lX4
Dim lY4
Dim lX8
Dim lY8
Dim lResult
lX8 = lX And &H80000000
lY8 = lY And &H80000000
lX4 = lX And &H40000000
lY4 = lY And &H40000000
lResult = (lX And &H3FFFFFFF) + (lY And &H3FFFFFFF)
If lX4 And lY4 Then
lResult = lResult Xor &H80000000 Xor lX8 Xor lY8
ElseIf lX4 Or lY4 Then
If lResult And &H40000000 Then
lResult = lResult Xor &HC0000000 Xor lX8 Xor lY8
Else
lResult = lResult Xor &H40000000 Xor lX8 Xor lY8
End If
Else
lResult = lResult Xor lX8 Xor lY8
End If
AddUnsigned = lResult
End Function
Private Function md5_F(x, y, z)
md5_F = (x And y) Or ((Not x) And z)
End Function
Private Function md5_G(x, y, z)
md5_G = (x And z) Or (y And (Not z))
End Function
Private Function md5_H(x, y, z)
md5_H = (x Xor y Xor z)
End Function
Private Function md5_I(x, y, z)
md5_I = (y Xor (x Or (Not z)))
End Function
Private Sub md5_FF(a, b, c, d, x, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_GG(a, b, c, d, x, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_HH(a, b, c, d, x, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_II(a, b, c, d, x, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Function ConvertToWordArray(sMessage)
Dim lMessageLength
Dim lNumberOfWords
Dim lWordArray()
Dim lBytePosition
Dim lByteCount
Dim lWordCount
Const MODULUS_BITS = 512
Const CONGRUENT_BITS = 448
lMessageLength = Len(sMessage)
lNumberOfWords = (((lMessageLength + ((MODULUS_BITS - CONGRUENT_BITS) \ BITS_TO_A_BYTE)) \ (MODULUS_BITS \ BITS_TO_A_BYTE)) + 1) * (MODULUS_BITS \ BITS_TO_A_WORD)
ReDim lWordArray(lNumberOfWords - 1)
lBytePosition = 0
lByteCount = 0
Do Until lByteCount >= lMessageLength
lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(Asc(Mid(sMessage, lByteCount + 1, 1)), lBytePosition)
lByteCount = lByteCount + 1
Loop
lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(&H80, lBytePosition)
lWordArray(lNumberOfWords - 2) = LShift(lMessageLength, 3)
lWordArray(lNumberOfWords - 1) = RShift(lMessageLength, 29)
ConvertToWordArray = lWordArray
End Function
Private Function WordToHex(lValue)
Dim lByte
Dim lCount
For lCount = 0 To 3
lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) And m_lOnBits(BITS_TO_A_BYTE - 1)
WordToHex = WordToHex & Right("0" & Hex(lByte), 2)
Next
End Function
Public Function MD5(sMessage)
m_lOnBits(0) = CLng(1)
m_lOnBits(1) = CLng(3)
m_lOnBits(2) = CLng(7)
m_lOnBits(3) = CLng(15)
m_lOnBits(4) = CLng(31)
m_lOnBits(5) = CLng(63)
m_lOnBits(6) = CLng(127)
m_lOnBits(7) = CLng(255)
m_lOnBits(8) = CLng(511)
m_lOnBits(9) = CLng(1023)
m_lOnBits(10) = CLng(2047)
m_lOnBits(11) = CLng(4095)
m_lOnBits(12) = CLng(8191)
m_lOnBits(13) = CLng(16383)
m_lOnBits(14) = CLng(32767)
m_lOnBits(15) = CLng(65535)
m_lOnBits(16) = CLng(131071)
m_lOnBits(17) = CLng(262143)
m_lOnBits(18) = CLng(524287)
m_lOnBits(19) = CLng(1048575)
m_lOnBits(20) = CLng(2097151)
m_lOnBits(21) = CLng(4194303)
m_lOnBits(22) = CLng(8388607)
m_lOnBits(23) = CLng(16777215)
m_lOnBits(24) = CLng(33554431)
m_lOnBits(25) = CLng(67108863)
m_lOnBits(26) = CLng(134217727)
m_lOnBits(27) = CLng(268435455)
m_lOnBits(28) = CLng(536870911)
m_lOnBits(29) = CLng(1073741823)
m_lOnBits(30) = CLng(2147483647)
m_l2Power(0) = CLng(1)
m_l2Power(1) = CLng(2)
m_l2Power(2) = CLng(4)
m_l2Power(3) = CLng(8)
m_l2Power(4) = CLng(16)
m_l2Power(5) = CLng(32)
m_l2Power(6) = CLng(64)
m_l2Power(7) = CLng(128)
m_l2Power(8) = CLng(256)
m_l2Power(9) = CLng(512)
m_l2Power(10) = CLng(1024)
m_l2Power(11) = CLng(2048)
m_l2Power(12) = CLng(4096)
m_l2Power(13) = CLng(8192)
m_l2Power(14) = CLng(16384)
m_l2Power(15) = CLng(32768)
m_l2Power(16) = CLng(65536)
m_l2Power(17) = CLng(131072)
m_l2Power(18) = CLng(262144)
m_l2Power(19) = CLng(524288)
m_l2Power(20) = CLng(1048576)
m_l2Power(21) = CLng(2097152)
m_l2Power(22) = CLng(4194304)
m_l2Power(23) = CLng(8388608)
m_l2Power(24) = CLng(16777216)
m_l2Power(25) = CLng(33554432)
m_l2Power(26) = CLng(67108864)
m_l2Power(27) = CLng(134217728)
m_l2Power(28) = CLng(268435456)
m_l2Power(29) = CLng(536870912)
m_l2Power(30) = CLng(1073741824)
Dim x
Dim k
Dim AA
Dim BB
Dim CC
Dim DD
Dim a
Dim b
Dim c
Dim d
Const S11 = 7
Const S12 = 12
Const S13 = 17
Const S14 = 22
Const S21 = 5
Const S22 = 9
Const S23 = 14
Const S24 = 20
Const S31 = 4
Const S32 = 11
Const S33 = 16
Const S34 = 23
Const S41 = 6
Const S42 = 10
Const S43 = 15
Const S44 = 21
x = ConvertToWordArray(sMessage)
a = &H67452301
b = &HEFCDAB89
c = &H98BADCFE
d = &H10325476
For k = 0 To UBound(x) Step 16
AA = a
BB = b
CC = c
DD = d
md5_FF a, b, c, d, x(k + 0), S11, &HD76AA478
md5_FF d, a, b, c, x(k + 1), S12, &HE8C7B756
md5_FF c, d, a, b, x(k + 2), S13, &H242070DB
md5_FF b, c, d, a, x(k + 3), S14, &HC1BDCEEE
md5_FF a, b, c, d, x(k + 4), S11, &HF57C0FAF
md5_FF d, a, b, c, x(k + 5), S12, &H4787C62A
md5_FF c, d, a, b, x(k + 6), S13, &HA8304613
md5_FF b, c, d, a, x(k + 7), S14, &HFD469501
md5_FF a, b, c, d, x(k + 8), S11, &H698098D8
md5_FF d, a, b, c, x(k + 9), S12, &H8B44F7AF
md5_FF c, d, a, b, x(k + 10), S13, &HFFFF5BB1
md5_FF b, c, d, a, x(k + 11), S14, &H895CD7BE
md5_FF a, b, c, d, x(k + 12), S11, &H6B901122
md5_FF d, a, b, c, x(k + 13), S12, &HFD987193
md5_FF c, d, a, b, x(k + 14), S13, &HA679438E
md5_FF b, c, d, a, x(k + 15), S14, &H49B40821
md5_GG a, b, c, d, x(k + 1), S21, &HF61E2562
md5_GG d, a, b, c, x(k + 6), S22, &HC040B340
md5_GG c, d, a, b, x(k + 11), S23, &H265E5A51
md5_GG b, c, d, a, x(k + 0), S24, &HE9B6C7AA
md5_GG a, b, c, d, x(k + 5), S21, &HD62F105D
md5_GG d, a, b, c, x(k + 10), S22, &H2441453
md5_GG c, d, a, b, x(k + 15), S23, &HD8A1E681
md5_GG b, c, d, a, x(k + 4), S24, &HE7D3FBC8
md5_GG a, b, c, d, x(k + 9), S21, &H21E1CDE6
md5_GG d, a, b, c, x(k + 14), S22, &HC33707D6
md5_GG c, d, a, b, x(k + 3), S23, &HF4D50D87
md5_GG b, c, d, a, x(k + 8), S24, &H455A14ED
md5_GG a, b, c, d, x(k + 13), S21, &HA9E3E905
md5_GG d, a, b, c, x(k + 2), S22, &HFCEFA3F8
md5_GG c, d, a, b, x(k + 7), S23, &H676F02D9
md5_GG b, c, d, a, x(k + 12), S24, &H8D2A4C8A
md5_HH a, b, c, d, x(k + 5), S31, &HFFFA3942
md5_HH d, a, b, c, x(k + 8), S32, &H8771F681
md5_HH c, d, a, b, x(k + 11), S33, &H6D9D6122
md5_HH b, c, d, a, x(k + 14), S34, &HFDE5380C
md5_HH a, b, c, d, x(k + 1), S31, &HA4BEEA44
md5_HH d, a, b, c, x(k + 4), S32, &H4BDECFA9
md5_HH c, d, a, b, x(k + 7), S33, &HF6BB4B60
md5_HH b, c, d, a, x(k + 10), S34, &HBEBFBC70
md5_HH a, b, c, d, x(k + 13), S31, &H289B7EC6
md5_HH d, a, b, c, x(k + 0), S32, &HEAA127FA
md5_HH c, d, a, b, x(k + 3), S33, &HD4EF3085
md5_HH b, c, d, a, x(k + 6), S34, &H4881D05
md5_HH a, b, c, d, x(k + 9), S31, &HD9D4D039
md5_HH d, a, b, c, x(k + 12), S32, &HE6DB99E5
md5_HH c, d, a, b, x(k + 15), S33, &H1FA27CF8
md5_HH b, c, d, a, x(k + 2), S34, &HC4AC5665
md5_II a, b, c, d, x(k + 0), S41, &HF4292244
md5_II d, a, b, c, x(k + 7), S42, &H432AFF97
md5_II c, d, a, b, x(k + 14), S43, &HAB9423A7
md5_II b, c, d, a, x(k + 5), S44, &HFC93A039
md5_II a, b, c, d, x(k + 12), S41, &H655B59C3
md5_II d, a, b, c, x(k + 3), S42, &H8F0CCC92
md5_II c, d, a, b, x(k + 10), S43, &HFFEFF47D
md5_II b, c, d, a, x(k + 1), S44, &H85845DD1
md5_II a, b, c, d, x(k + 8), S41, &H6FA87E4F
md5_II d, a, b, c, x(k + 15), S42, &HFE2CE6E0
md5_II c, d, a, b, x(k + 6), S43, &HA3014314
md5_II b, c, d, a, x(k + 13), S44, &H4E0811A1
md5_II a, b, c, d, x(k + 4), S41, &HF7537E82
md5_II d, a, b, c, x(k + 11), S42, &HBD3AF235
md5_II c, d, a, b, x(k + 2), S43, &H2AD7D2BB
md5_II b, c, d, a, x(k + 9), S44, &HEB86D391
a = AddUnsigned(a, AA)
b = AddUnsigned(b, BB)
c = AddUnsigned(c, CC)
d = AddUnsigned(d, DD)
Next
'MD5 = LCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))
MD5=LCase(WordToHex(b) & WordToHex(c)) 'I crop this to fit 16byte database password :D
End Function
%>
以上是标准的MD5加密类 参考技术A 1、主要就是调用库函数，MD5加密说到底也是函数计算，没有什么思路的问题，了解md5的发明算法，本质是一个数学问题。
2、例程：
#ifndef
MD5_H
#define
MD5_H
typedef
struct
unsigned
int
count[2];
unsigned
int
state[4];
unsigned
char
buffer[64];
MD5_CTX;
#define
F(x,y,z)
((x
&
y)
|
(~x
&
z))
#define
G(x,y,z)
((x
&
z)
|
(y
&
~z))
#define
H(x,y,z)
(x^y^z)
#define
I(x,y,z)
(y
^
(x
|
~z))
#define
ROTATE_LEFT(x,n)
((x
<<
n)
|
(x
>>
(32-n)))
#define
FF(a,b,c,d,x,s,ac)
\
\
a
+=
F(b,c,d)
+
x
+
ac;
\
a
=
ROTATE_LEFT(a,s);
\
a
+=
b;
\
#define
GG(a,b,c,d,x,s,ac)
\
\
a
+=
G(b,c,d)
+
x
+
ac;
\
a
=
ROTATE_LEFT(a,s);
\
a
+=
b;
\
#define
HH(a,b,c,d,x,s,ac)
\
\
a
+=
H(b,c,d)
+
x
+
ac;
\
a
=
ROTATE_LEFT(a,s);
\
a
+=
b;
\
#define
II(a,b,c,d,x,s,ac)
\
\
a
+=
I(b,c,d)
+
x
+
ac;
\
a
=
ROTATE_LEFT(a,s);
\
a
+=
b;
\
void
MD5Init(MD5_CTX
*context);
void
MD5Update(MD5_CTX
*context,unsigned
char
*input,unsigned
int
inputlen);
void
MD5Final(MD5_CTX
*context,unsigned
char
digest[16]);
void
MD5Transform(unsigned
int
state[4],unsigned
char
block[64]);
void
MD5Encode(unsigned
char
*output,unsigned
int
*input,unsigned
int
len);
void
MD5Decode(unsigned
int
*output,unsigned
char
*input,unsigned
int
len);
#endif
源文件md5.c
#include
<memory.h>
#include
"md5.h"
unsigned
char
PADDING[]=0x80,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
void
MD5Init(MD5_CTX
*context)
context->count[0]
=
0;
context->count[1]
=
0;
context->state[0]
=
0x67452301;
context->state[1]
=
0xEFCDAB89;
context->state[2]
=
0x98BADCFE;
context->state[3]
=
0x10325476;
void
MD5Update(MD5_CTX
*context,unsigned
char
*input,unsigned
int
inputlen)
unsigned
int
i
=
0,index
=
0,partlen
=
0;
index
=
(context->count[0]
>>
3)
&
0x3F;
partlen
=
64
-
index;
context->count[0]
+=
inputlen
<<
3;
if(context->count[0]
<
(inputlen
<<
3))
context->count[1]++;
context->count[1]
+=
inputlen
>>
29;
if(inputlen
>=
partlen)
memcpy(&context->buffer[index],input,partlen);
MD5Transform(context->state,context->buffer);
for(i
=
partlen;i+64
<=
inputlen;i+=64)
MD5Transform(context->state,&input[i]);
index
=
0;
else
i
=
0;
memcpy(&context->buffer[index],&input[i],inputlen-i);
void
MD5Final(MD5_CTX
*context,unsigned
char
digest[16])
unsigned
int
index
=
0,padlen
=
0;
unsigned
char
bits[8];
index
=
(context->count[0]
>>
3)
&
0x3F;
padlen
=
(index
<
56)?(56-index):(120-index);
MD5Encode(bits,context->count,8);
MD5Update(context,PADDING,padlen);
MD5Update(context,bits,8);
MD5Encode(digest,context->state,16);
void
MD5Encode(unsigned
char
*output,unsigned
int
*input,unsigned
int
len)
unsigned
int
i
=
0,j
=
0;
while(j
<
len)
output[j]
=
input[i]
&
0xFF;
output[j+1]
=
(input[i]
>>
8)
&
0xFF;
output[j+2]
=
(input[i]
>>
16)
&
0xFF;
output[j+3]
=
(input[i]
>>
24)
&
0xFF;
i++;
j+=4;
void
MD5Decode(unsigned
int
*output,unsigned
char
*input,unsigned
int
len)
unsigned
int
i
=
0,j
=
0;
while(j
<
len)
output[i]
=
(input[j])
|
(input[j+1]
<<
8)
|
(input[j+2]
<<
16)
|
(input[j+3]
<<
24);
i++;
j+=4;
void
MD5Transform(unsigned
int
state[4],unsigned
char
block[64])
unsigned
int
a
=
state[0];
unsigned
int
b
=
state[1];
unsigned
int
c
=
state[2];
unsigned
int
d
=
state[3];
unsigned
int
x[64];
MD5Decode(x,block,64);
FF(a,
b,
c,
d,
x[
0],
7,
0xd76aa478);
/*
1
*/
FF(d,
a,
b,
c,
x[
1],
12,
0xe8c7b756);
/*
2
*/
FF(c,
d,
a,
b,
x[
2],
17,
0x242070db);
/*
3
*/
FF(b,
c,
d,
a,
x[
3],
22,
0xc1bdceee);
/*
4
*/
FF(a,
b,
c,
d,
x[
4],
7,
0xf57c0faf);
/*
5
*/
FF(d,
a,
b,
c,
x[
5],
12,
0x4787c62a);
/*
6
*/
FF(c,
d,
a,
b,
x[
6],
17,
0xa8304613);
/*
7
*/
FF(b,
c,
d,
a,
x[
7],
22,
0xfd469501);
/*
8
*/
FF(a,
b,
c,
d,
x[
8],
7,
0x698098d8);
/*
9
*/
FF(d,
a,
b,
c,
x[
9],
12,
0x8b44f7af);
/*
10
*/
FF(c,
d,
a,
b,
x[10],
17,
0xffff5bb1);
/*
11
*/
FF(b,
c,
d,
a,
x[11],
22,
0x895cd7be);
/*
12
*/
FF(a,
b,
c,
d,
x[12],
7,
0x6b901122);
/*
13
*/
FF(d,
a,
b,
c,
x[13],
12,
0xfd987193);
/*
14
*/
FF(c,
d,
a,
b,
x[14],
17,
0xa679438e);
/*
15
*/
FF(b,
c,
d,
a,
x[15],
22,
0x49b40821);
/*
16
*/ 参考技术B 四种加密解密算法的源代码：移位密码、仿射密码、维吉尼亚密码以及置换密码
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <malloc.h>
void Shift() /*移位密码*/
char c[100];
int length, i=0, key=0;
clrscr();
printf("********Shift Cipher********\nPlease input primal sentence: ");
gets(c);
length = strlen(c);
printf("Input the key(0~26): ");
scanf("%d", &key);
getchar();
if(key<0)
printf("The value of key is error!\nPress any key to return...");
getch();
return;
for(i=0; i<length; i++)
if(c[i]>96&&c[i]<123)
c[i] = (c[i]+key-97)%26+65;
else if(c[i]>64&&c[i]<91)
c[i] = (c[i]+key-65)%26+65;
printf("Result is: %s\n", c);
for(i=0; i<length; i++)
if(c[i]>64&&c[i]<91)
c[i] = (c[i]-key-65+26)%26+97;
printf("\nAfter translated the sentence,we can see the primal sentence as follow:\n%s\n", c);
printf("Press any key to return...");
getch();
int gcd(int a, int b) /*辗转相除法求a,b的最大公因数*/
int k = 0;
do
k = a%b;
a = b;
b = k;
while(k!=0);
return a;
int Ni(int a, int b) /*求a相对于b的逆*/
int i = 0;
while(a*(++i)%b!=1);
return i;
void Affine() /*仿射密码*/
char c[100];
int length, i=0, ka=0, kb=0, tmp;
clrscr();
printf("********Affine Cipher********\nPlease input primal sentence: ");
gets(c);
length = strlen(c);
printf("Input the key(2 numbers): ");
scanf("%d%d", &ka, &kb);
getchar();
if(gcd(ka,26)!=1)
printf("The value of the key is error!\nPress any key to return...");
return;
for(i=0; i<length; i++)
if(c[i]>96&&c[i]<123)
c[i] = (ka*(c[i]-97)+kb)%26+65;
else if(c[i]>64&&c[i]<91)
c[i] = (ka*(c[i]-65)+kb)%26+65;
printf("Result is: %s\n", c);
for(i=0; i<length; i++)
if(c[i]>64&&c[i]<91)
tmp = Ni(ka,26)*((c[i]-65)-kb);
if(tmp<0)
c[i] = tmp%26+26+97;
else
c[i] = tmp%26+97;
printf("\nAfter translated the sentence,we can see the primal sentence as follow:\n%s\n", c);
printf("Press any key to return...");
getch();
void Vigenere() /*维吉利亚密码*/
char c[100], key[100];
int lenc, lenk, i=0, j=0, tmp;
clrscr();
printf("********Vigenere Cipher********\nPlease input primal sentence: ");
gets(c);
lenc = strlen(c);
strcpy(c, strupr(c));
printf("Input the key: ");
gets(key);
lenk = strlen(key);
strcpy(key, strupr(key));
for(; i<lenc; i++)
j = j%lenk;
if(c[i]>64&&c[i]<91)
c[i] = (c[i]-65+key[j]-65)%26+65;
j++;
printf("Result is: %s\n", c);
for(i=0, j=0; i<lenc; i++)
j = j%lenk;
if(c[i]>64&&c[i]<91)
tmp = c[i]-65-(key[j]-65);
if(tmp>=0)
c[i] = tmp%26+97;
else
c[i] = (tmp+26)%26+97;
j++;
printf("\nAfter translated the sentence,we can see the primal sentence as follow:\n%s\n", c);
printf("Press any key to return...");
getch();
void Permutation() /*置换密码*/
char c[100], *q;
int *key, len, m, i, j=0;
clrscr();
printf("********Permutation Cipher********\nPlease input primal sentence: ");
gets(c);
strcpy(c, strupr(c));
len = strlen(c);
for(i=0; i<len; i++)
if(c[i]<65||c[i]>90)
for(j=i; j<len-1; j++)
c[j] = c[j+1];
len--;
c[len] = '\0';
printf("Input the length of the key: ");
scanf("%d", &m);
key = (int)malloc(m*sizeof(int));
q = (int)malloc(len*sizeof(int));
printf("Input the key: ");
for(i=0; i<m; i++)
scanf("%d", key+i);
key[i]--;
getchar();
for(i=0; i<len; i++)
j = (i/m)*m;
q[i] = c[*(key+i%m)+j];
q[i] = '\0';
printf("Result is: %s\n", q);
for(i=0, j=0; i<len; i++)
j = (i/m)*m;
c[*(key+i%m)+j] = q[i]+32;
c[len] = '\0';
printf("After translated the sentence,we can see the primal sentence as follow:\n%s\n", c);
printf("Press any key to return...");
free(key);
free(q);
getch();
void main()
char i = '0';
clrscr();
while(i!='5')
clrscr();
printf("********Press 1~5 to choose:********\n");
printf("1. Shift Cipher\n2. Affine Cipher\n3. Vigenere Cipher\n4. Permutation Cipher\n5. Exit\n");
i = getch();
if(i=='1')
Shift();
else if(i=='2')
Affine();
else if(i=='3')
Vigenere();
else if(i=='4')
Permutation();
else if(i=='5')
break;
参考技术C 一直用内嵌函数md5()
或者http://www.delphibbs.com/keylife/iblog_show.asp?xid=16368
刚才看了看。晕了本回答被提问者采纳
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