[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