[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