[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
1.1k 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 | 1.1k 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:172.71.254.92
©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 | 175 views
12,783 questions
183,443 answers
172,219 comments
4,824 users