[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
5.9k 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 | 5.9k 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:172.69.17.59
©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 | 900 views
12,783 questions
183,442 answers
172,219 comments
4,824 users