[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