[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

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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