[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