[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 | 10k views

22 Answers

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

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;
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**  *  *  *    * *   * ** ****   e;
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* **   ****  *    ** * ***  = getchar();
* *  *** **  ****** **** * *  = a+3;
*** ***   ****  **  ***** * * *
* ** *  ****     ** *   **    = getchar();
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***** **  *   **    *** *   *    * * 
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**** * ** *  ******* *    **** = d+3;
 * *   * *  *  *  * ** **  *  * 
*   * * * * * * * ***  *  **  = getchar();
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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 * ***  {
***  * *    *** int num, * *
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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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*
* * =  *  *
 
* * 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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