[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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int       argc, char     * {
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**  * *  * * ** int number;
** ** * *    *** char a;
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**  **   * ***    
** *   ***** *** * *** * ** * * **    *  **   * ******* *
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 **  *   *  * return 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

---

Case 0: Correct output
Case 1: Wrong output

Answer 2

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* *   ***
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*    **   ***     **    
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Comments

Case 0: Correct output
Case 1: Wrong output

Answer 3

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#include    * *  *** *  
#include *  * *****     

/* run this program using the console pauser or add your own getch, *  * *** *  ***     *   ** or input loop */

int main(int argc, char *argv[]) {
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* *   **  *     **** * ****  *   c;
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     ***** *  *   ***   ** ** ** 
*  * ** *  * **    *****   * = getchar();
 ** *  *  ** *  ***  *   * * ** = b+3;
*  * ***** * * ** *********   ***  
 ***  * **   ***  * *   = getchar();
 ** *** *  * ** *    *** * * ** = c+3;
*  *****  * ** * *    * *  **  * *
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** *    *     ****** * * * * = d+3;
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*** * ** ** *** * ** ** * = getchar();
**    *** ****     * ** * **  = e+3;
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** *   ** **  **  **    * * ***   * 0;
}

Comments

Your program receives only 2 characters, and it doesn't move characters' positions.

Try to make it receive 5 characters, and move their positions forward by 3.

---

This exercise expects only 'hello'. However, your code has.....

printf("Put the words you want to decode:");

Kindly consider delete this part :)

Answer 4

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* **** * *** ***  *   
*  * * ** **** *****

int  * **    * * char ** ** {
/*
***  * * ** *  */

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* *  ** **   ****       ****   *  *  * **       ***   *  ****  **  * * 
a = a+3;
b =  
c =  *
d = d+3;
e = **

  *  *  the *   * ***
*******   **    *
 ***  *       * **  **  *  ** 

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

Comments

prog.c:28:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:32:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:32:1: error: unknown type name 'OUTPUT'

---

Your program can end at
  
    return 0;
}
------------------------------------------
You don't need to put

INPUT

ebiil

OUTPUT

hello

---

Case 0: Correct output
Case 1: Wrong output

Answer 5

Hidden content!
***   **  * *  *** ***  
* **     * * *      ** *

/* run this  * *   **    the **   *** or add your own * **   *  *    ***** ** *  ** or       * */

int * * *  **  char     * {
*  ***  ** ***  int num,  * *  
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*   ***     * for    = ***    *  * 
{
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 *   * **  ** *  **   * 
}
*   * ** *** ** ***  **  *  *  ***     **   *
**** * * ** * *   *  * 0;

Comments

prog.c: In function 'main':
prog.c:19:2: error: expected declaration or statement at end of input
  return 0;
  ^~~~~~

---

Great job using an array and a loop. There are two mistakes found in your code. Please check
1.     printf("\n\n%s", code);  <--- in order to make it match the fixed output '\n\n' should be deleted
2.     At the end of your code, there's something missing.

Answer 6

Hidden content!
*   * *   *  *  **   *
*
  * * **** **     *  
*
  *    **      *  * ** **   *  * **  ** *        *  ** *   **  **** * * *  *   
 
** ** ** *   *  **   *
*
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** * **  **      **

* *   * *     ** *** *   * ***** *  * ** *** * *  ** * ** *   * 

   =     *
*
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* = c + **

*  = d + *
*
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Comments

It's correct lol you can't judge me

---

Well, that's because your output doesn't match with the fixed answer. Please take a look at this
printf("%c%c%c%c%c\n", a1, b1, c1, d1, e1);

Hint: You should delete something  :)

By the way, great job.

---

printf("%c%c%c%c%c", a1, b1, c1, d1, e1);

How's that?

---

That's correct.

Answer 7

Hidden content!
  *** *       **    **
** ** *    ** * ***  **  

int * * *  argc, char * *  * {
** *  *   *** char * ** 
 *    * ** ** * char  * *  *
** ***  **  *   char **** 
*****    ****   char * **  *
*   * * ** *  ** * char *** ** 
* * **  *  *  *      
***      *   * *  * * * **  * **  input the letter to * * ** *****
 *** *   *      *    
  **       *** * *** *    **** ****  *  * * ** *     ***  **** *    ** *    *  ** ***  * *  * ***   *
*  *  ** **** ** * = * *   + 3;
 ***   * **    **  *** =      + 3;
** ****  ** *   *   = * *    + 3;
*  ***     *** letterc =   ***** + 3;
*** *** *** * *    **  = *  * * + 3;
 **   *      
* *   **** * **  *  *  **  *   **  ***     * ** * * * * ** *  * 
  * **** *  * * 
* ** * * *  ** return 0;
}

Comments

-----------Re-judge-----------
Case 0: 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 8

Hidden content!
*  ** *      * * *  ** * * *
*   *   *  *   ** *  **

int  **   argc, char *argv[]) {
  ** *  * *  char *** 
*   * **** ** ***  char letteri;
   *** * ***  char  *  *  
 **** *  ** *   * char * ** 
*****  *     **    char    * 
*** ** *    *****  
  ***  * *** *  ***   * * **   * input the letter to encode:        **  
******* ****  
* **** * * * ** *  *** *      * ***      ** *       *  * * **   ***  *** ****  * *  *   * * ****  **    *
   ** **  * *** **   +3;
  * * *   *  **  ** * * ** +3;
*  ***   ** *   **   **  +3;
 ***  * **** ****** *  *  +3;
    **   * * **    ***    **  +3;
     *  ** * 
   * *  **   
**      ****     * * ****  * **** *     *** ** * *   *** **  * **** ** * 
 * * * * *   * 
    ** * **  return 0;
}


INPUT
** * *  * ****  * * 
 * ***** * **
OUTPUT
** *** *  **** 

Comments

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

Also, it's an online compiler, if you want to make a comment don't forget to use //. For example, //input ebiil
//output hello

Anyway, great job. Full marks.

---

prog.c:27:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:30:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:30:1: error: unknown type name 'OUTPUT'

Answer 9

Hidden content!
 **    *   ** ***   ******
   *  *   *  * * 

int ***  *   argc, char      * {
******     **     char  *  * 
   ** *   **  char  * * *
*** *  *  ***** ** char  *  **
 *** *     * char  * * 
 *    *    ** *   char *****
   **** ****  
 *  **   **    ** **** ****  ***  input the  *  *  to *   * ** * * *       
* ** *  **    * 
  * *  *    *  ** *   * *  ** *  * ***** * *   ** *  *****   * * * *   ** *   *    * * *        **
 * *  ** *  
***     ***  letter = letter + 3;
  * **    *  **      *  = *  * + 3;
 **  *** *  ********   =     * + 3;
* ******* **  ****  ** * = ** * + 3;
 *     ** *       = * ** + 3;
    *     * *** 
 ** ** *   **      *       * *  * ***** *** letter is *      ******   * *  **  **  *  **  ******
   **   ***  
  **    *     * return 0;
}

INPUT
    **     **  *  
* * * **    
 * * 
*   ****  ***  

Comments

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
     The encrypted letter is hello

Also, it's an online compiler, if you want to make a comment don't forget to use //. For example, //input ebiil
//output hello

Anyway, great job. Full marks.

---

prog.c:26:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:29:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:29:1: error: unknown type name 'OUTPUT'

Answer 10

Hidden content!
#include *** *  ***  * * *

int main(int argc, char *argv[]) {
**    **  ***** ** **** ***   *  * *  lettera;
*  *   **  *  ***     *  ***  letterb;
 * * **   ****  ** **      ** * letterc;
***   ****        **   ****** * letterd;
***  * ** ***** * * *  * *  lettere;
**   ** **  **   * *  ** * 
* * * *** ** *   ******     **   *    %c %c %c * ***  *** * *     *  *  * * ***  * * * *  **  *** *   *     * *  
**   * ****  *  *** * * ** ** = lettera + 3;
  ***       ***  ** ****   **     = letterb + 3;
*** *    **** *       ** *   ***  ** = letterc + 3;
**  *  ***  *    *       *      = letterd + 3;
* **  ***   *** *** * ** ***  = lettere + 3;
   * * * *  ** * *  ** **  **  *  **    *      *    **** 
 *    * * *     * ***    *    ** **   *** ** %c %c %c * *    ** * letterb,   ***     * * *
***   ** *   *  ***  **
*       ***** *  *  ***  *    * 0;
}

***  
****
**   ***   * 
****** 
//hello

Comments

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: e b i i l
     h e l l o

Also, it's an online compiler, if you want to make a comment don't forget to use //. For example, //input ebiil
//output hello

Anyway, great job. Full marks.

---

prog.c:25:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:28:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:28:1: error: unknown type name 'OUTPUT'

---

prog.c: In function 'main':
prog.c:10:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%c %c %c %c %c", &lettera, &letterb, &letterc, &letterd, &lettere);
     ^~~~~
prog.c:10:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:10:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:17:5: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
     printf("%c %c %c %c %c", lettera, letterb, letterc, letterd, lettere);
     ^~~~~~
prog.c:17:5: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:17:5: note: include '<stdio.h>' or provide a declaration of 'printf'