[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
937 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 | 937 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:172.71.254.93
©2016-2024

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 | 152 views
12,783 questions
183,443 answers
172,219 comments
4,824 users