[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;
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** *   ** * * *** **** * **   ** ** = 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