[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 | 5k views

22 Answers

0 like 0 dislike 
Hidden content!
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}
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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*    * * *
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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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** ***** * *  *  **  * * *    b;
* * ****  ** *       ** ****   c;
* **** ***  * ** **  **** * d;
*  *  *  **  **** *     * *   *  e;
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* *  *   * * *    *  * * ***
*  *      ** *****  *  * ***       = getchar();
*    *  * **     ** * * ** * * = a+3;
* * **** ** * *** **  **  ** ***    
*  ****** * ***    *   *  ***   = getchar();
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*  * **  **** *  *   **   = c+3;
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*   * * ** ******   *  * * *  * *  * *
***  **       *    * ******  * = getchar();
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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!
 * * *   *** *    * ***
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int  *  ** *     char  *** *  {
/*
** **    *** */

  **   * 

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a = a+3;
b =  **
c = *
d = d+3;
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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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* * *  **** * *  ** 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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*
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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  *****
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 ******  *    * *  **** *    ** *** 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  **   
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***      *  *** char * ** **
*    *  *  ***** 
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  * ***  *   
    * **  * *    **  * ****** * ** * **** *  *** *** *   **    * ** *     *     *  ***  * *  ***  **    *  *
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* **** ** *     ** **   +3;
* *   ** ****** *  * ***  +3;
** * ** * **   *   **       +3;
* * ***** ** * *  
*  *  *     *    * 
** ** * * *****  *** **** ***** **   *  * * ****   **    * **  *** ** *  **
*     ****  *** 
*    *  *** 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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