[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

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 ****  * * *** *  * ** 

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