[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 | 10.3k views

22 Answers

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

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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** *   * * **** **  * *** *** *  b;
* ** ****   ****  *  * *  **    c;
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*    **  *  * *  *   ** *    = a+3;
* *** * * ** *   *  * **  **  ***
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* ** ** ** *  *** **   ***    = b+3;
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**  ***  *  **    *     ****  *  
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***  ** *       *  **  **   *  *      *
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 ***     * * *** * * *     = e+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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*   * **   * **    * ** ** * * ** *

**   ***   * *** *   *
        * *     **  ***    ***   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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* * ** **   ***    *  ******
}
 *   * *  **   **   * *** ** *   **   * *  *   *
 **   *   ***   *** 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 +   
*
** *    *
*
* ******* *   *  *  * *    *       ** 

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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 *   **  
*  * *     *  ** char  **  
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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;
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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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