[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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  ** **  ** **  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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*   *   *** *** *   * *  * *   d;
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*  * **    **  **  * **** ***      *  
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** *    *    **  **   *     *** = getchar();
*****  **  **   * *** *  = d+3;
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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!
  ***  *     *  *   ** 
**** *  ***  *****  *  

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   ** {
** *        *  int num, ** * 
***    *    ***** **    **
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{
*   *  ** * *  *  =   * 
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*  **  ** *** * = *   *  *****
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}
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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 + 
 
 * *    

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