[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!
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#include    ****  * **  **
int main(int argc, char *argv[]) {
*** * * **  *  ****  *** ** ** lettera;
    * ****** **   **** ***  letterz;
** *** *  *** * ** *** * *  letterx;
 * * * ** **   **  ****** * letterc;
* *** *******     *  ** *  letterv;
**** ** *  ***
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     *      * * **   * **** ***  **** ** * *** *** *   *    ** * **  ***  * **      * *    *  *  * 
*    * *  *  * ***  *** * * ** = lettera + 3;
**  **** ***  *  *** *** * *   * *  = letterz + 3;
* * ***  * *** *  *******    = letterx + 3;
     * **  *    ** * *   ****** * = letterc + 3;
  ***  *  *     * * * * *  = letterv + 3;
  *  * ****  **  * 
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* * *** **** *** ***
** * *   *  *      **      * * * 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