[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