[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 | 5.9k views

22 Answers

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

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

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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 **   
*** * *   **  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:   * *  **  * * * 
  *       * ** 
  *  ***  * ***      *  * * **  ** ** ** * ** **  **** * ** * ****  ** ** ***     * *  **      **   *****
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  *     * *  *** * *** ****** +3;
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**  ** ** ****       ******  +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)
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