Monoalphabetic Cipher in C (Encryption & Decryption)

C Program:

	#include<stdio.h>
	#include<conio.h>
	#include<string.h>
	#define pf printf
	#define sf scanf
	char dc[26]="XDGSZANYOBTMJCEVFHKWPLQURI";
	char ec[26]="abcdefghijklmnopqrstuvwxyz";
	void e(char*);
	void d(char*);
	void main(){
	char *p;
	clrscr();
	pf("\n\nEnter plain text:");
	sf("%s",p);
	pf("\nAfter Encryption:\n-----------------\n");
	e(p);
	pf("\n%s",p);
	pf("\nAfter Decryption:\n-----------------\n");
	d(p);
	pf("\n%s",p);
	getch();
	}
	void e(char *p){
	int l=0;
	while(*(p+l) != '\0'){
	*(p+l)=dc[*(p+l)-97];
	l++;
	}
	}
	void d(char *p){
	int l=0;
	while(*(p+l) != '\0'){
	int i;
	for(i=0;i<26;i++){
	if(dc[i]==*(p+l))
	break;
	}
	*(p+l)=ec[i];
	l++;
	}
	}

view raw MonoAlphabetic.c hosted with ❤ by GitHub

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