[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

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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