[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