[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;
* *       ** *   * *
***** * * *    ****   * **      *  *  *  ***  ***  * ***   ** * * *** *  * * 
*  *** * * *  ** * **
 ***  * *    *  ***     *  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