[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 | 4.3k views

22 Answers

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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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* = ** * *
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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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****  * * **      * ******    = c+3;
* ******      * ***  *   * ** *** *
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*  * ***   ** * ** **  *  * = d+3;
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*   * * * *** **  ** * *** = e+3;
* * * * * ***  * ***   *  ** 
** ***   * * ***    *   ***   *   * **   *   * **     * * ** *
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** * *** *    *  ** *** ** 
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*   * *******  *   ******   
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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!
 * * *** *  *   * 
 *  *    * *   ***   *** 

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

***    **  * 

   ** ****   *     *   *  *     * ****   ***** * * * ***  * ***
a = a+3;
b = * *
c = * * 
d = d+3;
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   * {
* ** *  *  * * int num,    *
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{
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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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** = 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  *    
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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: *** ** *   * * 
*    *   * 
   ***   * *       *  **   **  *   *      **** *   *  * **** *** ****   ***  **   **** ** ***  
* * *      *   ****  * *   +3;
*  **     **  ** **     ** ** +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  **
 *** **   *    
* *  * ** *  *  *   *   * * 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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