[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