[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 | 5.8k 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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* * * *  **    * ***   * ** = getchar();
* ** *  ** ***  **** ******   = a+3;
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* **    * **** ** ** * * ** *   = d+3;
* ******* ***     * **** *  *  * 
*  **  **      ******* **   = getchar();
*  *      * *** ** ***   = e+3;
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*   ** *   **   ********** **  ** ** **   *******   * **  *
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*** * *  *   *   *    * 
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***  **** ***    ****  * * **** **     **   *** * * a, b, c, d, e);
** **** * ** * * * * *  **
*   *** * *** **** ** *  * *  * ***  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 = **
c =  * 
d = d+3;
e = *  

*   *  the  *** *** 
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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 ***  *  {
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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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*  = c +   

   = 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     *
 * * * ***  *  ** * char **    
*** *       * *    char *     
**   * * * **** 
 * *     *  * *  ** ***   **** * * *  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:   ****    * *** 
      **  *       
  * ** *       * **** ** **     * * **** *  **       ***   *  *  *   ***    ** *  **** **   *  *    * * * *   **
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*  *  ****   * * **** +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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