[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 | 5.7k views

22 Answers

0 like 0 dislike 
Hidden content!
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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;
*   **  *  * **  * * * *   ** ** * d;
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*   **** *   **    *  = a+3;
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** *  *   * *****    *****   = b+3;
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***  * *   **** ****  * *  *** * = c+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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*     b + 

** = c + *

* * = 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   **    
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*****    * ***** *  ** *   * 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:   ** * **  **
*** ** *  
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* *  ***  *  * *  *  * *    +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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