[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4k views

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 /* */

[Exercise] Coding (C) - asked in Chapter 2: Syntax structure of the C language by (5.9k points)
ID: 26955 - Available when: Unlimited - Due to: Unlimited
edited by | 4k views

22 Answers

0 like 0 dislike 
Hidden content!
   *    *     * * * ** 

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

 * * *****  int number;
**    * **  * char a;
* *      ** ******** **  * *  *  b;
  **  **     **  *    * * *  * **   *  c;
* *  *** *** ***  *   *  *** d;
  *********   *** *   **  ** *  e;
*  *       ** ** 
    * ** *  **  *    ** forgert how to shift word * ***   ** * * *  *  * *    
 ***      * *** * **    ***   * *******     ** ** *** * **   *****  *  *      **
*  * *    * *** * 
 * * *    * * * * the message how??
  * **    *   
** *** * ** *  * *  * ** **  ********* *   **** **  *  ***
    *   ***   
   *   **     * return 0;
}
100/100 answered by (449 points)
edited by
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
****  ************ ***

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

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

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

** ** 
 * * *  
 *      
*****   
*     * *
 
 *    *    *    * * ***  **
*
100/100 answered by (153 points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
1 like 0 dislike 
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;
}
100/100 answered by (281 points)
edited by
0 0
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.
commented by (5.9k points)
0 0
This exercise expects only 'hello'. However, your code has.....

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

Kindly consider delete this part :)
commented by (5.9k points)
1 like 0 dislike 
Hidden content!
** ** * * ******* *   
 ** *   ***    *  *** * ***

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

  *    * * 

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

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

**  *     ****  ****
* *  *****  *  * ** ***   **** 0;
}
100/100 answered by (273 points)
edited by
0 0
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'
commented by (4.3k points)
0 0
Your program can end at
  
    return 0;
}
------------------------------------------
You don't need to put

INPUT

ebiil

OUTPUT

hello
commented by (5.9k points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
* * * ***   *** ***
** ***** * *** **   * ****  

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

int ** *   ** char        {
**  *    * *    int num,  *** *
*    ** * **  **
     *    *  * 
*  * * ****  *   * ** *    *  * ** * **
* * **    * * for *  =   * **     *  *  
{
 **** **  * * **   *   =    *** ** 
* * * * * **  * if  *     ***     
 *  **   **  ** * * = ***  *   * ** 
 *      ****  * * *  **
}
 * * *** *  *** **   *****       * *  * * * *
 **    * **   *  ** 0;
50/100 answered by (252 points)
0 0
prog.c: In function 'main':
prog.c:19:2: error: expected declaration or statement at end of input
  return 0;
  ^~~~~~
commented by (4.3k points)
0 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.
commented by (5.9k points)
1 like 0 dislike 
Hidden content!
*   *  * * **  **
*
* **   **  ******* *  * *
*
** * * ** *   ****   **    ****    * *   *    * ** *  ** ** *  *  * ******* *** * **  *       *    *
 
*** **   *   **  * **   *
 
  *  *  *  * *  **

* *  *             *
*
 **** ** *    *  * *** * * ** *** * **   *  *   * **    * * * *  *** 
*
*  = *  *
*
  b + *

** = c + * 

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

   ** * ** *  **  ***** *      **      *
*
**    *
100/100 answered by (268 points)
0 0
It's correct lol you can't judge me
commented by (268 points)
0 0
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.
commented by (5.9k points)
0 0
printf("%c%c%c%c%c", a1, b1, c1, d1, e1);

How's that?
commented by (268 points)
0 0
That's correct.
commented by (5.9k points)
1 like 0 dislike 
Hidden content!
**        * * * * * *  
* * **  *    ***    

int    * * argc, char * *  {
  ****** * *   char *** 
****      * *  char *** *  
  * **    **  * char * 
*     ** *   **  char  **
** * *  * ** *** char   ** 
**  *  ***  ** * 
*    ***   *  *** *** ** *     input the letter to ***** **  *****
* *      *** 
* *   ***      *   **  ****   *** *  * *** *  *** *  *     * ** ** *   **   **  ****      **** *  ***** *
   ***    ** **     *    = **  + 3;
* **  * *   *  *   * =  *   + 3;
  *** **  * *       *   = * * + 3;
 *  * *** **  **  letterc =   **  + 3;
    ****   *    *   *  =  * + 3;
*    *      
** * **   **** * *** ****  *   *   **   * **    *       ** ** *        
 *  **    * ** ** * 
**       ***    return 0;
}
100/100 answered
reshown by
0 0
-----------Re-judge-----------
Case 0: Wrong output
commented by (4.3k points)
0 0
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.
commented by (5.9k points)
1 like 0 dislike 
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
  * * ********
100/100 answered by (269 points)
0 0
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.
commented by (5.9k points)
0 0
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'
commented by (4.3k points)
1 like 0 dislike 
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
  ******** *  * * * *  
**** * *    
    * 
**    **   * * *
100/100 answered by (290 points)
reshown by
0 0
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.
commented by (5.9k points)
0 0
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'
commented by (4.3k points)
1 like 0 dislike 
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
100/100 answered by (271 points)
edited by
0 0
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.
commented by (5.9k points)
0 0
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'
commented by (4.3k points)
0 0
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'
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.70.127.68
©2016-2025

Related questions

0 like 0 dislike
2 answers
Shifting backward
[Normal] Essay (Open question) - asked Dec 12, 2017 in Chapter 2: Syntax structure of the C language by 許哲瑋 (449 points)
ID: 37081 - Available when: Unlimited - Due to: Unlimited | 617 views
12,783 questions
183,442 answers
172,219 comments
4,824 users