[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 | 2.4k views

22 Answers

0 like 0 dislike 
Hidden content!
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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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   ** **    *  * ** * **   * 
*    **  *  ***   *   ***    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 = *   
d = d+3;
e = * *

     the **   ** 
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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!
   ***  * **  **  *   *  ***
***  * * ** **  *** ***  * *

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***  * * * ****   * * =     * * * *
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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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** = c +  

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***      

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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 * * *
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**      *   *   
* ***  *   **   ***     ** ****  *         ***      *   ****** *   **  *  * ** ** *  * *  *  *** **** *
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 *  *  * * ***  *  **   = **   + 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   ***  
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   **       ***  
*  ** *     **  *   *  * * *****  **  **   ** * * ****  **   ******  ** *  * *   **    ** *  * *     *  *
**** **   ** ***        * *  +3;
*** *    *** *   ***** *  +3;
* **       ****** **  *  +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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