[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'