[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!
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#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!
    **  *    ** ** *  * * 
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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