[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.4k 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 | 4.4k 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:172.69.7.171
©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 | 702 views
12,783 questions
183,442 answers
172,219 comments
4,824 users