[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 | 5.6k views

22 Answers

0 like 0 dislike 
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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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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* ** *  *  ****  ****  * *   = c+3;
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*  ** * * ***   ***   = e+3;
*     * *    * * *** **** **  
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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!
 **      *****     * ***
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int *      *  char * *** {
/*
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a = a+3;
b = * *
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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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** *     * *    ** * * * *  *
}
   * **   * * **  * ** * * ** *  *  ** *  *  *  
**    * * ** ****   *  * 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)
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Hidden content!
***  *  *  ** **  ***  

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