[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