[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 | 5.8k views

22 Answers

0 like 0 dislike 
Hidden content!
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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 */

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** *  **** * **     *  = c+3;
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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  * *   {
/*
**** *  * ** */

    *   ** 

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

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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 +  *

*    * *
*
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*
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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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***    * *  **     *** = * ***  + 3;
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* * *  ******  letterc =   ***  + 3;
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*    *         ** 
  *** *  * ***    * *  *  * *   * ** * ** *  * * **    **** * **     **
  ***   ** * 
 * *   * *** * * 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 ***   
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** **  **** *** *    **** * * input the letter to encode: ** **    *   
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*     **  ** ****  * *** * +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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