[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;
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***         **  *   * *** *       *** *** ****   *     *  ** * * ****  **    **  *   *** ** *   ** * **   *   **  *
  *   * *** *  ****   **** * ** **   = lettera + 3;
***  * *   * *** * **   *   *  **   = letterz + 3;
**  * ***  * * ****** *  * * **   = letterx + 3;
*  ** *  *   ****  *   * *** ****  = letterc + 3;
*** ***       ****** ***** ** *  *** = letterv + 3;
   * *****     ***  *
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*   * *  ** **
 **     *   * *** *    * 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