[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