[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 | 3.5k views

22 Answers

0 like 0 dislike 
Hidden content!
*** **   **    **  ** 

int * ** * argc, char  ****  {
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*  *  ** *  *  int number;
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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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*  *     * *  
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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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* * **    ***  **  * *** 
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*      *  ** *** * * * * ***  = getchar();
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 **** ** *****  * ***  ** *   * = getchar();
  * *** *****  *  ***    **  * = b+3;
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*   *  * **    * **  *  = getchar();
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*   * **  *   ** ******  *  *  * *  
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 *    ** *  *** *    *      = d+3;
* **  **   * *   *  ***  ** * ***
*  * * *    * ** *   *   *  * = 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;
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  *  {
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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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