[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 | 10k 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;
***  ** * *     * **** ** ** c;
*  *   ** ** *    * ***   **  d;
* ** ***   **  * ** *  * **  *  e;
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*  *    *  * ** *  *** *** = getchar();
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*********** *  *    *  **  *  * = b+3;
**  ****    * ** **  ** **  * * *** 
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*  ****  *  ** *  * ** *  *  = c+3;
**         ******   * **  *     
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* * * *****   *** **    ** *** = d+3;
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* *** **** ** ***     * **     * 
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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;
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,  * ***
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{
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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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** = * *   

*    b +   

** = c + *

* = d +   
*
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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  **** 
 * *** ** **   char   ***
     * *  *   * char  *  *
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*  *   *   * *** 
** **  ***** * *      *    *** input the letter to  * *  ****   *
  ******  * * * * 
    ** ** ***    ** ** * ** ***  * **  *  *** *  * ** **   *** * **  * **       *** * * * *  * * 
*  * *   *  *  *  **** = * *** + 3;
* ***    ** *  *    * * * =  *  + 3;
*     *   **  *    *  * = * *  + 3;
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***   * *     * * ** =  *  + 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;
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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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