[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