[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