[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