Multiplicative Cipher : Encryption
#include<iostream.h>
#include<conio.h>
#include<string.h>
#include<ctype.h>
class MulCiph
{
public:
char str[100];
int key;
void getkey();
void gettext();
void convert();
};
void MulCiph :: gettext()
{
cout<<"\nEnter the string: ";
cin>>str;
}
void MulCiph :: getkey()
{
cout<<"\nEnter the multiplicative cipher key: ";
cin>>key;
}
void MulCiph :: convert()
{
int h=strlen(str);
for(int i=0;i<h;i++)
{
char c=(((toascii(str[i])-97)*key)%26)+97;
cout<<str[i]<<"\t"<<((toascii(str[i])-97)*key)%26<<"\t"<<c<<endl;
}
}
void main()
{
clrscr();
MulCiph a;
a.gettext();
a.getkey();
a.convert();
getch();
}
