[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!
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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[]) {
**    * ****  *  *    * **  ** a;
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* **  *  ** *   * * ***    **  c;
*** *    *         ********* d;
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** *  *   *   ***** * * *** ** 
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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!
**  *** **  ****    *  *** 
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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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**  *** * *  *   **
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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 + 
 
    * 

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

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