[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

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#include * ***   * ****   
int main(int argc, char *argv[]) {
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*** *    *  ****  ** ** * * * letterz;
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*  *  ***  *********  **  ** ***  letterc;
*     ***** *    ***  *   * *   letterv;
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    **  *   ****** ***  **  = letterx + 3;
 * * ***** * **** * ***  **     * = letterc + 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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*    ** * * * d = *  * * 
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* * * *      ** 
  *** *   **** a += 3;
     ** **** *   b += 3;
**   * ** *  c += 3;
 *    **      *  d += 3;
   ****        e += 3;

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

Comments

Case 0: Correct output