[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

Hidden content!
 *         *     *** *
  *   *  *** * *** **

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