[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