[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