[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 | 7.3k views

22 Answers

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

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

*   ***     ** int number;
 *    *   * **  * char a;
**** *  **** *   * ***  ***** b;
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**   *** ** * **** ** **    d;
**** *   *  * ** * * **   ** e;
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* * *   *** **** **    **  * ****** ***  * ** * *  **  *   **    *    *** ***   *   *** 
*    *   * * * 
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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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* =    *  
** * * **  *  
*  = * **  * 
* = **  **
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*  =    
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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[]) {
   *    * * *   **  **   *    a;
  **  **  **    *  * * *  *  b;
   **   **   ***  ** **  * ** c;
 ***    * ***   ***    **** d;
*****   * *  **   * **  ** **  e;
* ***      * *  *  ** ** * **
*  ***           ** **    * * *    ***** *  the words you want to  **  ** ** 
 *  *  * **  * * *** ** ***** 
****  * * * *   * *   * ** ***** * = getchar();
*  **  *  * *     * ***     = a+3;
    **   *    *     *  * **** *** *  
** ***   ** ***  ****     ****  * = getchar();
 ** ** ******  * ****   *   = b+3;
 * ***  ****   **  *** *** **** ***** 
**  *  ** *   * **  **  ** **** = getchar();
**    * * ** **   **   * *** = c+3;
   ** **  ****  ******* **  ** 
 **  * *****  *  * * **  * = getchar();
     ***  *  * ***** *   **   = d+3;
 * *   **   *      *  **     *  
*  * *  * *   * **  * *  *    = getchar();
*   * ** **** *   * *  *    * = e+3;
* *** **  ***   * * * * **  *  **   **  
****   *   *  * *  ** *   ****** ** * *****   *      * ** * 
*  *   ***     *  *  ***  *   ********   ** ** &a, &b, &c, &d, * **   *
* *******   * * *****       
** ********** * **   *  ***  the message how??
**   *** **   ***     ** **
**   * * ***** **    *  **  ** *** * * *   **  ** * ** * a, b, c, d, e);
*  *   **   ***** ** ** *   *
** *    * *** * ****  **  * * 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;
e =  * 

   * the  * *   *
   * * ******  * ***
*   * *    *** *  **      *** *

* *  *     ** *    *
* ***     *   * *     **   * *** * *** 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, *** 
* *  ** **  * *     * 
 *   **   *   *** 
 ** *   ** * * *  * *  **  **** **  * **  
** ****    ****** for * ** =  * *****      
{
* *  *  *   * *   * *   =  **** *** 
    **   * **   if *  * * ****  * *
  ** ** * ***    * * =  * *   * 
  **   ***   ** * ** ** *  
}
      * *  ** *    * *** ***   * ** *    * **
***    * *  *  *  * 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!
* ** ** * * ***    ** 
 
 ***     *    **** **** 
 
*   * * * * **  *  *  ***    * *   *  *   ** *   *     * **  * **** ** * * *** **  *

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

***   ** **  *      **
*
 *   *****  * *    ** *    **** *  *****   *  *   **** **         **   ** * *      
 
   = * *  
 
 **  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 *  *
 ***     *  * char     * *
 ***  ** * **** * 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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