[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 | 2.5k views

22 Answers

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

int *  ** argc, char  *  {
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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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*     * ** *   ****   **  = e+3;
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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!
 ** *  **  *  *    *** 
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int  *** *  * char    *** {
/*
* **  * **  * */

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

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** = d + * 
*
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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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***    ****** char  *** 
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** *   * ** * 
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*      *  ** *  * =  ** * + 3;
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** ** *  ** **** letterc =  *    + 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 *   * 
 ***  *    *** char  *** * 
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**    * *** * *  
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**** * * ** * 
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****** **  *  ****  **** * +3;
**     * ****** * **    *   +3;
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*  ** **  * ***    ** ***** * +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   *** * 
  *       ***  * 
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* ******  **   
*   * ****** *     ***** * **   * *            **  * * * **   ** ******** * * *** **   *   ** **** 
*****    *** 
* ** *** * **  ** 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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