[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[]) {
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****  *  ** ***   *   *    * *** letterz;
  ** **  ** ** *   * ** * letterx;
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*** ** *  ******** ***    *  ** letterv;
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* *  *** ** ***  *   **  * * ******   *    ***   * * *  * * *   * **         * *  **  **  * *** **     ****  *
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*  * *  ***   * * ****** ***  * = letterx + 3;
* **** *    *** ** *  ***  ***  **** *** = letterc + 3;
* *** ****  **** *  ** *** **  **  = letterv + 3;
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 ***  * ****** ** * *
 ***     ** *     **   * * *** 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

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int ***    argc, char   *    {
      * * **    char * *  *
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* ***** * **   c = * **   *
***    *  ***** d = * ** **
*     * ***  e =    **
****** *   *   *** 
*  *  *  * * ** a += 3;
 ** *  *       b += 3;
*    *  *** c += 3;
  **    *** d += 3;
**  *   *****  e += 3;

   *      * *  *  ***  
  ** * * * * * *  **
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** ***   **  ***  *
  **  ** *   * **   * 
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*  * *    *  ***  
  ***   **** * *  *    **  **   *  0;
}

Comments

Case 0: Correct output