[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