[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