[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;
**   * *  * *
* ***  *  *  * * ***  **  ** *  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