[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
7.4k 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 | 7.4k 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:172.69.17.67
©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 | 1.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users