[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