[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 | 4.8k views

22 Answers

0 like 0 dislike 
Hidden content!
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}
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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}
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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** * *  **  *  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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*    * *     *    *  ***      * * ** *    * **  ** *     *  *** *** ****    * ** * * * *
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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  **
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* **   * ** **** * 
*  *   **   ***  *** * **    * * *   ***    * *  *********    *   **   * *  *   **  * **   ** *   *    
*   *    *  *** *****  =   *  * + 3;
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* * **  *   **  *    *** = **  ** + 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;
*  *  *    **  char  *   *
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}


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 ******
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**  * ** * ** * 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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