[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 | 4.7k views

22 Answers

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

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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+3;
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**  ***** ** ****    ** *    = getchar();
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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!
 **    ***** **  *  *    
****     **     *****  

int  * **    * char *   * {
/*
    *    ** * */

*   *  * * 

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a = a+3;
b =  *
c = * 
d = d+3;
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***** **  *  ** *  *
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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!
 ** ** ****       * **  
**** *  *   **        **

/* 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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** * * * * ***    * *  ** **  * **  *  * *** **      **   ** ***  ***
*
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*
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   = c +   

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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  **   ** *** ***
*   ***  ** *  *** 
**  *  ** * *    * *   ** **  *  ** * * * **      * *  * * ** * * *  **       *** ***     *****  *
 * *   *  *  *   *  = * *   + 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;
*  *    ** **** *  ** * * +3;
*****   * *      **   * +3;
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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    * 
 * ****     *  
      * ** ***   **    * * ***  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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