[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
1.1k 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 | 1.1k 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:172.70.126.7
©2016-2024

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 | 175 views
12,783 questions
183,443 answers
172,219 comments
4,824 users