[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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* *  * *  ** ***  int number;
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* *  *** * * *  * **    *** * *   d;
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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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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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******  *  ** **  ** **  ****  = b+3;
*    **** ** *   * ** ***** * ** *
* ** * *  *** * **   *  * *  = getchar();
 *  * ** *    *   * * ** * = c+3;
 *  * *  *  ******  * * ** **     * 
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***    * *        *  ***   = d+3;
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}

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

*  **  **    * *   
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}

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

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****          *  * **  *

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

int **  * *    char  * * ** {
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{
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*    *     ** *** if  *   * **  *  *
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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

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

  *   **  ***  *       ****

 * * *    *   * *  *        ***   **     *   * * ** ***  ***** *    * ******      *  *   * *  
*
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*
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*
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* = c + *

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**   *   

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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'