[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 | 2.4k views

22 Answers

0 like 0 dislike 
Hidden content!
** *  *   **  ** *  *

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   * **   ***  int number;
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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;
*     ***   **** *  * *** * * *  d;
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*    **        ** * **     *** = a+3;
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*    ** ** * * *  * * *** * = b+3;
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*   **** ** **   **  *       = c+3;
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* **  *  *  ** **  **  * **  ** = d+3;
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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!
        * ***    ** * ** 
* * * ******

int  *  **      char ** *  {
/*
****   *     */

*       * * 

***   ***   ** * * * ***  * ****   *   * **    * *  *  **** *     * *
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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*  *  *   *   ** if   * *     ** * *
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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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***  * *  **    * *  *   *  *  *  * *** *  *     * * *     ***   *  *****  
*
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*** = 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   * 
**      * * * char ****
*********  * *  char * * 
*  * **   * ** *  * char *  *** 
 **    * **     ** 
* *  *   ** **  ** * **** **   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 **  
*    * ***  *  *    char  **  
*  *   *** *    
*****   *** * *  *  ****** input the letter to encode:   **** **  ***
**  *   ** * 
**   *               *** *      **  *** *** *   *** * *****   * * *** *     ******  * ***   * * 
* *  *     **  ****    ** +3;
*  **     *     ** **  ****  * +3;
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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 **   
*   * ***  ** 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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