[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:172.70.179.85
©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