[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