[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!
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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