[Exercise 03] Caesar Cipher Decoder

Question

You have received an encrypted message from Julius Caesar-- the message is ebiil.  You are asked to decipher the message in order to understand what Caesar trying to say to you.

Hint

Luckily, Caesar has given you a hint, he says: 'I, myself, encoded the message by shifting every word backwards by 3.' 

Solution

Write a program that receives 5 characters 'ebiil'. Then decode those characters into 5 new characters.

Example

#include <stdio.h>

int main(int argc, char *argv[]) {


	char a;
    	char b;
	 	
	scanf("%c%c", &a, &b);
	
	//decode the message how??
	
	printf("%c%c", a,b);
	
	return 0;
}

Input

ebiil

 

 

 

 

 

 

 

 

 

 

Output

hello

** REMEMBER ** 
This is an online-compiler, don't put anything except the codes. If you want to make a comment, please use // or /* */

Answer 1

Hidden content!
** *  **  **  **  
#include  *  * *  *   
int main(int argc, char *argv[]) {
 **** *   *   * ****** ** *  * lettera;
*  *  **  ***** **  * ** * letterz;
 **   ***  *** * * ** **  ** letterx;
** ***** ****  *     ** * **  * letterc;
* ** **   * ***    * *  ** *  * letterv;
**   ** *  ** * 
  ***  **  **  **  * *   *   *  input the letter to encode: ");
    ** *  ** *   ***  *   *  **  *  *** *** * * ***** ** ** *  * ** *        ***   **      **** ****
 ****  **  **  ** *** ****  * = lettera + 3;
** * *  ** *   ** ***** * *  ** *  = letterz + 3;
**   ***  * **  **  ***  * *   * = letterx + 3;
 * ****    ***** **      *** *  = letterc + 3;
*     ***** *       **** *    ** = letterv + 3;
** **    * ***** * *   *
* *** ** ** *  *** ** **   *  *** **  *   *   **  * *  *   **  **** 
 **    * **     
    **  **** *        ** *  * 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output

---

Nice, it is correct. You might be wondering why your automatically-generated score is 0.
That's because it expects its output to be only 'hello'. However, what your program showed was:
     Please input the letter to encode: ebiil
     hello

Anyway, great job. Full marks.

Answer 2

Hidden content!
****    * * * ***  * 
 **  ** ** ***** *   ** *

int * * *   argc, char      {
 * **   **     char   **  **
* * ** **       
**  * *       a =  * ***
    ***     *   b =  ** 
  * *      * ** c = *** * ** 
 *  **  * ** * *   d = **  *****
 *  ***    *****   e =  *  ***  
 **    **** **  
   * * *****  a += 3;
  *  *   ***       b += 3;
**    ***   **   *** c += 3;
*   **  ***     d += 3;
* *   * **      e += 3;

** ****      *****  **  *   *
 ** * **   **  *    *  *
* * **     ** *   **   
  *    *  *  *      ** 
*** **  ***        **
** **       ** 
 * *     *  *  
 ****   ** *  
* ** * * ** ** *  * * *  **  0;
}

Comments

Case 0: Correct output