[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