[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!
** *  ***   ***  **   

int  *   * argc, char  * * * {
*  * *** *    *   **** ** * *** */

*  *  * *  *** int number;
   *  * * * *  char a;
 *   *    * *   * *   *** *  *   b;
   * *  *  ***  * * * c;
*  * *** *******    * *** * d;
*  *  ** *** ***  ****         e;
**  * ** ****      * *
 * *** * * ** *  *** * forgert how to shift word  ***  *   *  * *  
   **  * *   ** ******* * *  ****  * **   * *  **     * *   * *  *  *   * **   
*  *       ** * 
 **   *  *     the message how??
 *      *  *    
 *** * *  *** * *  * ** ***** * *  **    *  * *  
**  ** * * * ****  
****   *  *  **  *  return 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

---

Case 0: Correct output
Case 1: Wrong output

Answer 2

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

***   **  ***  * *    * {

   * * ** 
* =  * *** 
*      **   ** 
** =   *
* = **   ** 
  = ** *  

* =    
 = **
  = **
** =     

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

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 3

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

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

int main(int argc, char *argv[]) {
*  *** *** * *   * * *  * a;
 **  * ** *** **  *   *     *  b;
   *  ***    **  *   * *   c;
*    ***** *     ** ***** **  * d;
 ***    ********** *    ** ******   e;
 *  *** ** ****   **** *  
** *  * *   * ***** *   ** **  * **** *  the words you want to * *  *** ** **
  ** **  *    ** *  ***  **  *   
   *  * * ****  **** * * *  * = getchar();
*     **** *  * ***** *   = a+3;
 ** ********   ******* ***  ** *  **  
 *** *   *  *   ** * = getchar();
 ** *** **    * **** **  = b+3;
 ** ** * **** *  *  **  **  *
*   ** ****  **  **  *     = getchar();
 ******    * * *     * * ** ** * = c+3;
 ***     **    * * *******  *  * * 
* *** * **  * * * **  * **** *  = getchar();
  * **  ** ** ** ***  ** *  = d+3;
** *    * *  * ***   ****   *** *
* **   * ** *** ***  * ****** **  = getchar();
*****       **  * ** *** = e+3;
 ** * *  * * *   *   ****** ***
*       ** *    ** * *** ** * ***  * ** * * ** * * ****    
* *  * ** ***   *  ***  *** *** **  *  * *** *  * *    ** * &a, &b, &c, &d, *** * *
 ***  ***   ** *  *  *
   *    *** ** * ***    **** **  * the message how??
*     * ***    * * * * ** **  *
 ****   *  * *  ****   * *      ** * * **   *** *** *  * a, b, c, d, e);
 *   *  *  ****   *  * *   
 ***  *  ** * ****   *  **  *  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

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

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

*** *  *   

* * *     ****  ** * *       * ***    **** **          *  *   * * 
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, ***
 * ** *  **   * **  *     
 *****    * *   *  
*    **   *    * ***   ** **** ****   
    *   *   *   for  *  =  ***  *         
{
** ****  * *  *   * = ***** **  
*  ** *  * * *  if * **   *  * * 
 ** *  **   *** =   **** * * **
*   ****  ***   ** *   * 
}
 **      * *****    *   *** * * **    ******  * *
* ** *  ** *  * *  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!
***** **   ** * **  
*
 ***   ** * ** *  ** 
*
 *  ** * ** * *    **** ** **  *    *  **   **  *  * * **  *  *   ***   *   *   * *  **** *** 
*
     ***  **   **     * * *
 
 ***  *  ** * *  

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

   = *   
*
    * b +  

** = c + * 

*** = d + *
 
  *   * 
*
*  * *   **  ** ** * *    **   

** *   

 

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'