[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!
  ** ** ***       *
#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

Hidden content!
***     * *    *   
 *    * **  **   * 

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