[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