[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
5.6k 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 | 5.6k 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:172.71.203.112
©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 | 855 views
12,783 questions
183,442 answers
172,219 comments
4,824 users