[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 | 2.5k 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 ***  *****     ****   

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int main(int argc, char *argv[]) {
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**     **  *  ***  * * ****
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}
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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}
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!
*  *     *  *** **  *** *
**   *  **         ** 

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