[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:172.69.58.104
©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 | 170 views
12,783 questions
183,443 answers
172,219 comments
4,824 users