[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

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Hidden content!
* **   ******** *******

int ***** * argc, char * *** {
  ***  *  *  *** ****    ** **  */

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*  ** **  *   **  char a;
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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;
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*    * * * *  ***** *   * * *  * = getchar();
* * *       ** * * *** *   *    = a+3;
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** *   ** **    * *** ** * = getchar();
**     **** *     * **   * **  = b+3;
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**  *  ** ****    **  * * *  = getchar();
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* **  ** *** * *  *** * **  * ** *
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*****  ** * *   *    * ***  * *  
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    ****    *****  **** = e+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!
** *  ***  * *   ***
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int  ****  ** char    ** {
/*
*  *   *** **  */

* *  * * *  

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

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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)
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Hidden content!
 *   ***   *** *   *
 
*   *  *** *   *  ***
*
 *   *  ** ***** ***     * * ** **** ** *  **    *    **  ***  *     *  * *****   **  *** **  *
 
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*
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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  *** *
 *   *  *  * * *   char  **
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*  * ** ** ***  char   * *
* ******  *   *  * char  *  **
**   ** *    * * 
*****  * * * **  *  ** ***  * *  input the letter to  ** *  * ***  
      *  ***  *** 
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* *****   *  *   ** * = **   * + 3;
* *** **  **  **  *  * = ** + 3;
**  *** *    *** * =   **  + 3;
** **    *  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 **   
**** ****   * * char   *  
* ***  *  *  char **** 
 *** * ***  *** 
* ****  ****    *  ** *** * input the letter to encode:   *      * * **
*******   **   *    
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*****     **  ******  +3;
   ***    *    ** ****  *  +3;
******   *** * *** *   *  +3;
*  ** ** ***    * **    *  +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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