[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