[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 | 5.8k views

22 Answers

0 like 0 dislike 
Hidden content!
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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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** *   *  ***  *** ***** ***   = a+3;
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**    * *    *    ** *  *  ** * **
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*  * * * * *** * *** *  * *  *** 
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* ******  *  * * *   ** **  = d+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;
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* **     the *  *  * 
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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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     *        * ** 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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*  = 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 * * *
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* *   * ** *** ** 
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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 *  *
***    * *       * 
***  ****** *********   ** input the letter to encode: ** *  **** * **  **
* ** ****   *  * 
*  * * *****  *  *  ** **   *** *  * ** * **  *  *  ** ** * *****   * *  * *  *   *** ******** **  * ******  * **
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* * ***   ** ** ** * * ** +3;
**  **** ******   * ** **** +3;
* * **     *** *   *    +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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