[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