[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
3.7k 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 | 3.7k 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:172.69.17.205
©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 | 558 views
12,783 questions
183,442 answers
172,219 comments
4,824 users