[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