[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 | 4.5k views

22 Answers

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Hidden content!
***** * **    *** * 

int **** * argc, char **  * {
*** **** * ***  *  *** **** */

**   ***   *    * int number;
 ** *  ** ** *  * char a;
  *   ****** **  *       * *** *  b;
** ** * *   ***   *   * * **   *  c;
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**   *** * * *   
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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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* =  * 
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* = * *
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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[]) {
**  * ***** ****   **  ** * a;
 **   ******    *  * **   *  b;
* * ** * *   * **  * ** **** *    c;
    ** ***  **  *   * * *** ***  d;
*  ** *  *    **   * *    *    e;
*  ****   *   * * **  
** *** * * *  ** * *** *    **   ** the words you want to * ***   * 
***  *   *   *    * * ** * 
  *  * **  *** **  *     ** = getchar();
*** * * * *****    ***    * * * * = a+3;
 *** *   *  *  *** *  *  **   *    ** ** * 
  ***  * *  *******   ** **  = getchar();
   * *    **** * **** * = b+3;
 *  **** * ** * ** *  **  **  *** *
  **    * ***  **  *  *   ***  *** = getchar();
** * * ** *   ****** *** ** = c+3;
    ** **   *  **** ***** **
 * ***  ***     **   *  * = getchar();
   **   *   * *   *    ** = d+3;
*    * ** **    * **   * * ***  ***  * *
  **   *** ***  *** * ** *** = getchar();
 *    ** **** * * * **  ** * * = e+3;
* * *  ***   *  *** *   ***  * **  *
     * *  *  **** ** * ** **      *** **  **  *   *  *   **
* *     **   *** *    ***** * **   *  * ***    * *      &a, &b, &c, &d,  * *** **
   *  * ** * ** *   *   *  *  
 ***   * * *  * **  *  * *  * *****  the message how??
*  ** ** ***  ** **   *  ** 
* *  **    *  ** ****  * **   ***  *   * * ****   a, b, c, d, e);
   ***  * ***** *****  *    *
***** ****  **    *   ** *  **    *    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 * **  {
/*
  **  ** ** */

  * **  *  

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

 **     the **    ** 
    *** ***  **    * 
*** *     ***  *  ** ******* *   * * * 

 ** **** *** * ****** 
 ******** * *     * *  *   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 *** {
* ** *    *** int num,  ***
 ***    * ** ** **    * **  
*******  **  * 
 *  **  *****   * * **** **  * ****
  * **  **   for * =  * *  * *   
{
   **   ******    *** = *   *  
**  **  *    if  *    *    ** *
  ** *  *   **       * =    * ***  
* * *   * *** *  *** * *  
}
 ** *    * ****    * *  ** **   *  * *    **
*  **   ** **  ** 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!
** *     ** *    ***

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

 * * *  **   *** * 
*
 *  **  * ** **  * *    ** * *    **       *   ****    *       ** **    *
 
*** =     
*
 * * b + **

*  = c +  

   = d +  *
 
*  * * **

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

 ***    
*
*
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    *  *
 *  *    *   char * ** *
**      ***** char **      
** ***** ****  
* **    * ***  ****** ***   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:  *  ** **  * ***
* *  **** 
***   ***    *  ** *     *** *  * ***  **    *  *  **  *** ** * *   **  ***   **   *   *** ** ***  
 ******  **       **  * ** * +3;
 *    * * **    *      +3;
  ***  *** *****   * ** * +3;
** *****    ** **   ** * +3;
 *    * * *  ***   ** * +3;
*  *     *****  
  ***   ***  
*   * * * ** *  **  * * * *     * * *  *** * * *****  * *   ****  ***  
** ** *  ** 
 *   * ** *   * 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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