[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!
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   * ** ** *        * *

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