[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