[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