[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 | 7.2k views

22 Answers

0 like 0 dislike 
Hidden content!
*    ***    ** *  *

int   ** argc, char ** **  {
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}
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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    * *****   * * * * * ** *** c;
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* ** ** ** *  *    *  *** ** e;
*    **  ******   ** **   **  
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****     *      *  ** *
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*******  ***  *   * = a+3;
*  ** ***** *** *  *  **** **  ***
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*   **** ****   *      * **  * * = b+3;
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*      * *   ***      **   *   = d+3;
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**** *  * * * * ** ****  = getchar();
     ****  *  **** *** *   * * * = e+3;
* **** *  * * * ***    * *   ***** 
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**   **    **   *   *** **  
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}
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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*  * ****     * *  ***
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}
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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}
* ** * **    *   **   *  *  *  * * ***  
* **** * ** * * ****** 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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 * = 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 *  **
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   * *   * **  ** 
   *        **  *****   ** ** 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;
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*   ***   * **   * *  *  +3;
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*  * *     ***   * 
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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 **    *
* * *  *   ***  
 *    *    ** * *    *   *  * *  * 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)
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