[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 | 4.4k views

22 Answers

0 like 0 dislike 
Hidden content!
*  * *   *         

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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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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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    * ** *** ** *   *** ***
 * *      *  **** ** *     *     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!
      ****      * 
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int **    ** char    * *   {
/*
*** *  * * * ** */

      **** *

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a = a+3;
b =  *  
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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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}
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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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* *   *   *
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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    * 
*  *** *  * * * char * *  
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**  * *   ** **  
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*** *   *    *  ****  = * * * + 3;
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*  * * ** *****      = **     + 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   **
*** *      *    
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*    *       ****  
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* *  *  ***      **** * *** +3;
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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   * 
   * ***   *  *  
 *  *     ** *    ***  **** *   ** * 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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