[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