Code For Monoalphabetic Substitution Cipher And Double Transposition Cipher

2011-10-17T11:58:00.000-07:00

//****************************CPP FILE*************************************//

#include<iostream>

#include<string>

#include<stdlib>
#include"fstream.h"
using namespace std;

char ciphers[26];

char filename[26];

ifstream file1;

char type;

int flag=0,ind=0;

int flag1=0;

int y=0;

char keyword[11];

char keywordweights[11];

char ch=65;

char ed=0;

char plaincipher[26][2];

char c,c1;

char temp[2];

int l=0,flag3=0;

char filename2[]="encryptedfile.txt\0";

char filename3[]="decryptedfile.txt\0";

int len=0,wt=1,count=0,numofrows=0,col=0;

float mod=0;

ofstream file3;

char **doubletrans='\0';

void decrypt()

{

cout<<"Enter Name Of the File You Want to Decrypt:";

cin>>filename;

cout<<"Name Of The File To Be Decrypted:"<<filename<<"\n";

ofstream file2("decryptedfile.txt");

file1.open(filename);

while (file1.good()) // loop while extraction from file is possible

{ l=0;

c = file1.get(); // get character from file

count++;

}

file1.close();

count--;

numofrows=count/len;

doubletrans=new char*[numofrows+1];

for( int i=0 ; i < numofrows+1 ; i++ )

doubletrans[i] = new char[col];

for(i=0;i<len;i++)

doubletrans[0][i]=keywordweights[i];

ind=1;

int rr=1;

int ff=1;

i=0;

int flag4=0,tt;

file1.open(filename);

while (file1.good() && tt<count) // loop while extraction from file is possible

{ l=0;

tt++;

c = file1.get(); // get character from file

itoa(ind,temp,10);

if(rr==numofrows+1 )

{

ff=1;

i=0;

}

while(i<len && ff==1)

{rr=1;

if(doubletrans[0][i]!=temp[0])

{

i++;

flag4=1;

}

else

{ ind++;

ff=0;

break;

}

if(rr<numofrows+1 )

{doubletrans[rr][i]=c;

rr++;

}

file3.open("keymatrix.txt");

for(i=0;i<numofrows+1;i++)

{

for(int j=0;j<len;j++)

{ cout<<doubletrans[i][j];

file3<<doubletrans[i][j];

}

cout<<'\n';

file3<<'\n';

}

file1.close(); // close file

ofstream file11(filename3);

cout<<"decrypted text:";

for(i=1;i<numofrows+1;i++)

{

for(int j=0;j<len;j++)

{if(doubletrans[i][j]!='X')

{

cout<<doubletrans[i][j];

file11<<doubletrans[i][j];

}

cout<<'\n';

cout<<"Key Matrix File is 'keymatrix.txt' and Cipher Table File is 'ciphertable.txt'\n";

cout<<"Your File Has Been Dencrypted and Dencrypted Data Is Saved To File :"<<filename3<<"\n";

}

bool findchar(char charr)

{

int len=strlen(ciphers);

int t=0;

while(t<len)

{

if(ciphers[t]==charr)

{

return true;

break;

}

else t++;

}

return false;

}

int main()

{

ofstream file3;

ofstream file4;

ch=65;

temp[1]='\0';

for(int i=0;i<26;i++)

{

ciphers[i]='\0';

filename[i]='\0';

}

for( i=0;i<11;i++)

{

keyword[i]='\0';

keywordweights[i]='\0';

}

cout << "Enter Keyword(max characters 10 are allowed and all in upper case)";

cin.getline(keyword,10);

len=strlen(keyword);

for(i=0;i<26;i++)

{

for(int h=0;h<strlen(keyword);h++)

{

if(keyword[h]==ch)

{ flag3=1;

itoa(wt,temp,10);

keywordweights[h]=temp[0];

temp[0]='\0';

wt++;

}

ch++;

}

cout<<"Keyword Entered:"<<keyword<<"\n";

ciphers[0]=keyword[0];

y++;

ch=65;

for( i=1;i<len;i++)

{ if(false==findchar(keyword[i]))

{ciphers[y]=keyword[i];

y++;

}

for(i=0;i<26;i++)

{

if(false==findchar(ch))

{ ciphers[y]=ch;

y++;

}

ch++;

}

ch=97;

for(i=0;i<26;i++)

{

plaincipher[i][0]=ch;

plaincipher[i][1]=ciphers[i];

ch++;

}

file4.open("ciphertable.txt");

cout<<"Cipher Table:\n";

for(i=0;i<26;i++)

{

cout<<plaincipher[i][0];

file4<<plaincipher[i][0];

}

cout<<"\n";

for(i=0;i<26;i++)

{

cout<<plaincipher[i][1];

file4<<plaincipher[i][1];

}

cout<<"\n";

while(flag==0)

{

cout<<"Enter 'S' for Monoalphabetic Substitution Cipher and 'T' For Double Transposition Cipher:\n";

cin>>type;

if (type=='S')

flag=1;

else if(type=='T')

flag=2;

if(flag==1)

{

cout<<"You Selected Monoalphabetic Substitution Cipher!\n";

break;

}

else if(flag==2)

{

cout<<"You Selected Double Transposition Cipher!\n";

break;

}

else

cout<<"Wrong Input\n";

}

if(flag==1)

{

while(flag1==0)

{

cout<<"Enter 'E' for Encryption And 'D' for Decryption:";

cin>>ed;

if(ed=='E')

flag1=1;

else if(ed=='D')

flag1=2;

if (flag1==1 || flag1==2)

break;

else

cout<<"Wrong Input\n";

}

if(flag1==1)

{

cout<<"Enter Name Of the File You Want to Encrypt:";

cin>>filename;

cout<<"Name Of The File To Be Encrypted:"<<filename<<"\n";

ofstream file2;

file2.open("encryptedfile.txt");

file1.open(filename);

while (file1.good()) // loop while extraction from file is possible

{ l=0;

c = file1.get(); // get character from file

while(plaincipher[l][0]!=c)

{ l++;

}

if(l<26)

file2<<plaincipher[l][1];

// if (file1.good())

// cout << c;

}

file1.close(); // close file

cout<<" Cipher Table File is 'ciphertable.txt'\n";

cout<<"Your File Has Been Encrypted and Encrypted Data Is Saved To File :"<<filename2<<"\n";

}

if(flag1==2)

{

cout<<"Enter Name Of the File You Want to Dencrypt:";

cin>>filename;

cout<<"Name Of The File To Be Dencrypted:"<<filename<<"\n";

ofstream file2("dencryptedfile.txt");

file1.open(filename);

while (file1.good()) // loop while extraction from file is possible

{ l=0;

c = file1.get(); // get character from file

while(plaincipher[l][1]!=c)

{ l++;

}

if(l<26)

file2<<plaincipher[l][0];

// if (file1.good())

// cout << c;

}

file1.close(); // close file

cout<<" Cipher Table File is 'ciphertable.txt'\n";

cout<<"Your File Has Been Dencrypted and Dencrypted Data Is Saved To File :"<<filename3<<"\n";

}

else if(flag==2)

{

cout<<"Weights Assiged To Keyword:";

for(int h=0;h<strlen(keyword);h++)

cout<<keywordweights[h];

cout<<"\n";

while(flag1==0)

{

cout<<"Enter 'E' for Encryption And 'D' for Decryption:";

cin>>ed;

if(ed=='E')

flag1=1;

else if(ed=='D')

flag1=2;

if (flag1==1 || flag1==2)

break;

else

cout<<"Wrong Input\n";

}

if(flag1==1)

{

cout<<"Enter Name Of the File You Want to Encrypt:";

cin>>filename;

cout<<"Name Of The File To Be Encrypted:"<<filename<<"\n";

ofstream file2("encryptedfile.txt");

file1.open(filename);

while (file1.good()) // loop while extraction from file is possible

{ l=0;

c = file1.get(); // get character from file

count++;

}

file1.close();

count--;

mod=count%len;

while(mod!=0)

{

count++;

mod=count%len;

}

numofrows=count/len;

doubletrans=new char*[numofrows+1];

for( int i=0 ; i < numofrows+1 ; i++ )

doubletrans[i] = new char[col];

for(i=0;i<len;i++)

doubletrans[0][i]=keywordweights[i];

file1.open(filename);

int rr=1;

while (file1.good()) // loop while extraction from file is possible

{ l=0;

c = file1.get(); // get character from file

if(rr<numofrows+1 && col<len)

{doubletrans[rr][col]=c;

col++;

if(col==len)

{

rr++;

col=0;

}

col--;

while(col!=len)

{

doubletrans[rr][col]='X';

col++;

}

cout<<'\n';

file3.open("keymatrix.txt");

for(i=0;i<numofrows+1;i++)

{

for(int j=0;j<len;j++)

{ cout<<doubletrans[i][j];

file3<<doubletrans[i][j];

}

cout<<'\n';

file3<<'\n';

}

//cout<<"rows:"<<numofrows<<'\n';

file1.close(); // close file

ind=1;

for(int j=0;j<len;j++)

{itoa(ind,temp,10);

for(int i=0;i<len;)

{

if(doubletrans[0][i]!=temp[0])

i++;

else

{ ind++;

break;

}

for(int u=1;u<numofrows+1;u++)

{cout<<doubletrans[u][i];

file2<<doubletrans[u][i];

}

cout<<" ";

}

cout<<"Key Matrix File is 'keymatrix.txt' and Cipher Table File is 'ciphertable.txt'\n";

cout<<"Your File Has Been Encrypted and Encrypted Data Is Saved To File :"<<filename2<<"\n";

}

if(flag1==2)

{

decrypt();

}

return 0;

}

//****************************CPP FILE*************************************//www.google.com

Bubble Sorting In Ascending Order

2011-10-16T04:13:00.000-07:00

/*****************************************************************************************************************************/
// This Program Bubble Sort An Integer Array In Ascending Order.
/*****************************************************************************************************************************/
#include<iostream>

using namespace std;

int main()
{
int array[7]={10,3,2,6,14,8,5};
int len=7;
int temp;
for(int i=1;i<len-1;i++)
{
for(int j=0;j<len;j++)
{
if(array[j]>array[j+1] && (j+1)<len)// then swap
{
temp=array[j];
array[j]=array[j+1];
array[j+1]=temp;
}
}

}

cout<<"Array After Bubble Sorting is(ascending order):"<<endl;
for(int k=0;k<len;k++)
cout<<array[k]<<" ";
return 0;
}www.google.com

Visual C++

Code For Monoalphabetic Substitution Cipher And Double Transposition Cipher

Bubble Sorting In Ascending Order