[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.5k 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 | 4.5k 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:108.162.216.208
©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 | 705 views
12,783 questions
183,442 answers
172,219 comments
4,824 users