[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 | 6.5k views

22 Answers

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

int   *** argc, char  *   {
** *  *    **    **  ** * *** */

** *       **    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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*  * ****   ** *    *   **** * d;
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*   * * * *** *          * *** * = getchar();
**** *        **** *** *  * * = a+3;
** ****   **  **  **  *  ** * **  
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**  **  *       ** ***   ***    * * *** 
*   * **   * *    ******  * = getchar();
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****  *  **   *** * ****  = getchar();
*** * **** *  **    ** * **  = d+3;
   ****   ** *  **   * *   ** ** **  *
*  *       ******** *  ** *  ** = getchar();
**  * ***  ** *  **** ***  = e+3;
*** * ******  ** **** *** * *    **
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***  *  * **   *      ***  *   ***** *  * ** ** * **  &a, &b, &c, &d, *       
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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 = **
c = **
d = d+3;
e = 

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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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}
* *****  ****   *   *  *  ***   ** ** *
 **   **     * * 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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**    * **  * * *

*     *   * **   * *   * *   **     ** *    ** ** *    *  *   **    **
 
  = *   *
 
   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 ** * 
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 *  ***    *   * 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;
  **** * *  *****     **    * +3;
** **** *  * **  **   * ** +3;
  *  ** ** **  * *** *  * +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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