[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