[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 | 7.3k 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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*  **** *****       * *  * *  d;
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**   ** *      * *** * **  = 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!
 *    *  *    * * *
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int ** *** ****  char *     {
/*
* *    *  *** */

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

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* *   *   
*
*   ** **  * * **           * ** ** *
*
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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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* * ***    *    char  * **
 * *    * ** * 
** **      * *   **  *** *    *  input the letter to ****  ****  ***
   *    *  **   
*****  * *       * **    * * ** *   ***  ***  ***   **  *** * * *     ****      *  *       *    *  *
****** *  * ***  ** * =   **  + 3;
*  ** * * **  *    ***  = **  + 3;
*** ****       *** * ** =  *  + 3;
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  **  *** ** *****  *** * =     + 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;
 * **   * ** **   **     * +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 **   
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 *** *  *******        **** ** 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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