[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 | 1.1k views

22 Answers

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

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*     *   *** *  
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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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*   ******     * * **    = c+3;
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*  ** *** * *      * ***  * ** * *
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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;
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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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*
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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*    * ** *   * char  ****  
*   ** *   *** char  * * * 
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** * *   ****  ***** * ** *  ****     **** *     **   ***  *    * ***  **      **   ***   
* * *   *   **  = **     + 3;
* ***   ** *   *  = ** * + 3;
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*  * ** *** **   *   = * *  * + 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;
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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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