[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
5.6k 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 | 5.6k 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:172.71.254.135
©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 | 859 views
12,783 questions
183,442 answers
172,219 comments
4,824 users