[Exercise 03] Caesar Cipher Decoder

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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 | 8.1k views

22 Answers

0 like 0 dislike 
Hidden content!
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int     * argc, char  * ** {
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* **  *  **    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!
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** *****   *   ** *****  {

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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[]) {
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*    *  ***  ** **  **   b;
**   **      * * ** ***    c;
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***   **     ** *   ** *  = a+3;
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* * ** * **  ** **** **** *  = b+3;
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** *** ***    *       ** ***     *  ***  *
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 ** ** ***  *  *  *  *  **  
*****   ***    *** **   * *******   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    **** {
/*
**    * *** * */

*  * *   

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a = a+3;
b = *** 
c =   
d = d+3;
e = *

    the *   ** 
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** *  **   **  *** * *  *  *   *** 

  *  **** * ** **  * * 
**  * ***   * *****      *  *       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 ** *  {
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{
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}
**    * * ** *  * **  *  ** *   * ** *  ** *
     ** *           *** 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!
*    ***** *    ***    

*    **  **  *   * **   *
 
  * *  ****     * *  ** **               **   * * * ***  **  *   * *   *** *

*  *        *   **     
 
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*
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* = d +  
*
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  ***** **  ****  ** * * *     * * *   *   **
*
** *** 
 
*
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  *   
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** ** **     **  char    *   
   *  *     *  ** char    * 
*   *  *       * char   **
***** * ***** 
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*  *** *  ** * * 
 *   *    *   *  * *  * *     * *****   * * **  *****  **  * *   ** ** ** * * *     *      **  *** *   *** **
 *   *   ** *** *   * * =      + 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    * 
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      * * ***** char *****
 *   * ***  **** 
   ** * *** * **   ******   input the letter to encode: **         *  ****
*** *    *** * 
**     * *    **  ***   ***    * *   * * *** ***   * **   *****    **    *** *  *** ***  **  *   *   * * * *     *  
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**   *   *          ***   * +3;
**  **   ***  *  **  *** *** * +3;
   ***  **     
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* ***  *** * ***  * * *       *  * **   *  **  * ** *  *  * ***
 **  **   ***    * 
 **  ***   *** * 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 ** **
  *   *    * *      
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* * **      *  * *  
* *** **  * ***    ****  * *  *    *  *   *     ** *** * *   * *  **    **** **  *  * **** ***  *   * **   
** ****  ****  * 
 ****    * * 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)
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