[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 | 3.7k views

22 Answers

0 like 0 dislike 
Hidden content!
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int *   ** argc, char ***   {
**** * ***     * *       *  */

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*    ** * * *** char a;
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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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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;
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*  *** *  *   ***  **  * **  
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  ** * ***  ** *  * ****** = a+3;
*     **     *****  *    *  **  **
*   *   ** * ** *  *** *  *** = getchar();
*   *   * * * *   ** = b+3;
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******** * ***  *  *   **  *** * * = getchar();
*   *** *** * * * *    *   ***  = c+3;
 * ** *    *   *  *  ** *** **    *
 * *   **** * *  * **      *  = getchar();
*****   ** **      **  *  = d+3;
***   ** ***** *  *  * ** *      ***
**     * ** *       ** * *  = getchar();
   ** *** ****    **** *  ** = e+3;
**  *  * *   **  **    * *   * **
* *   ******* *  * **        *  ****  *** ***  * * *    
*     *  *  * **** *  *    *  * **  **  ***     &a, &b, &c, &d,    **** * 
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* *  **   ***** * *  * **   * 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!
  ****    * *    *****    
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int *  ** * ** char **** * {
/*
    *  *  */

***     *** 

*     * *******  *** * ******** ** ****       * *   * ***   *  * 
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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**** *  ** *      * * ***** 
}
 * *  *  *    *    ***  **  **  *   * ** 
***  *  **           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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*
* * * ***  *  ***   *     **   ***     *       *  *   *** ** * ** *  **
*
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*
 *  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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