[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!
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#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