[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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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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**   ***    * ** ***  *******  * = getchar();
*** * * **  ****  ** *** *  ** = a+3;
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***  **  ***         ****   * = d+3;
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*   ****   * * *    **  ** = getchar();
**      **  ****     ***** ** = 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;
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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 *  *   {
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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;
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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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