[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