[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

0 like 0 dislike 
Hidden content!
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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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   *   ** ** * ** ******* *  * 
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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 =  * 
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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    ** */

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{
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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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*  *   * **** *   ** ****  **  * *    *   *    * * * *    *  *    * *    

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*   *  *  *   * *  **       **  ** *    *      *   *  * *         
 
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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 * * *
  ** *  * **  char  * * *
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* *  **    **  char  *** *
* * * ***** *  * 
  ** *   ****** *   *** ** **** input the letter to ** ** * **
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* *  **  *  *    ***  =   ** + 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  ** * 
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** * **** * *   * ** char  *** 
* **         *  
  * * * * ** ** ** *   *     input the letter to encode:   * *   ****  * 
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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    * 
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 ********  *    
****  * *   *   ** *** **  **  *  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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