[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
2.5k 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 | 2.5k 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:172.70.126.65
©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 | 348 views
12,783 questions
183,443 answers
172,219 comments
4,824 users