[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