[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 | 4.4k 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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*    *  *  **  *   *        c;
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*** ****** ***** *** **  *  * = a+3;
***  * ***   *** ***   * *  ***** 
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* ***  ******* ***** *  ** * = c+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 =  ***
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   *  * */

int *** *    *** char * * ** {
***  **  **   * int num, ** * 
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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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** * 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;
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 ** *    *  *   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 * * 
*   *** *   ** 
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   **    *    ** 
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* *    ** ** * *  ***        +3;
*** ****  * *   * **** +3;
**    *** * *** *      **  +3;
**   **    * ****** * *   * **  +3;
****  *  ***** **  
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*        ** * *      **  *  *** * ***   *** ****  * *         **
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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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