[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

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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;
  *  *     * *   *
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   * **   *    ** **   
 *    **  *  ****  ***  * *  *** ** * 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