[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