[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
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 | 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:172.69.17.131
©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 | 768 views
12,783 questions
183,442 answers
172,219 comments
4,824 users