[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 | 949 views

22 Answers

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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!
  *   *  * ***    * 
**   *  ***  *   * * *

int ** **      char * *  * {
/*
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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!
*     *** *  * **  *  *
*  ****   ***    *  * ***

/* run this *** *  ** the      *   * or add your own ** *   *        ****** *   * or * *   */

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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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*  =      
 
* * b +  

* * = c + 

*** = d +   
*
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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 *** *
* * *  *** *  *  char  ** 
*  *  *  ** ** char **** 
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 ***     ******   * **** ****  input the letter to  * *******  
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***   *    ** ** * ** *****  * *  ***  *   * * ***              ******* **     ***    *  * ***** ** 
***** *  ** *** * **  = *   + 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 ** ** 
*    * ****  
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* * *     **    * 
 ** *   * **               **** ****  * * * *      * **    ****  *  ** *  *  *  * * * *  ****  *  * ***** * ** *
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      * * *  **    *** **   +3;
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** ** **  *  * *   ****     +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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