[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