[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 | 5.6k views

22 Answers

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

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

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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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*  ** * **   *  *** **    *** *  e;
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* **    * *  * **  ** * *  = getchar();
  *  *  * *****   *  **  = a+3;
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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 = *** 

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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 ****  {
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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 +   

*** = c +  

* = d +  *
 
*  *  * *

   **  *** *****    ** *  ***  *      *    

  ** *
*
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 *  * 
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        * *  * * char **   * 
** *   **   * * 
*   *  *** ** * *    * * *     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: * *  *  * *    * 
**  *  * * ***   
 * * **  ***     * ***  **  *   ** ** *** **  ***    *   *** **  ***   *  ** * *** *  * ** *    *  *  *  
*  *   ****  *  **   ** *  * +3;
**     * *   * *   **   +3;
**** ** ** *  ***   **   ****   +3;
   ****  * * **   * **    +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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