[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 | 1.1k 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      * **   ** 

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int main(int argc, char *argv[]) {
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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!
*    *       **  
*  **  ** * *** * * **  * 

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       * */

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