[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