[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