[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!
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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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*** *** *     *  * ***   d;
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* **  * *  ** ***  * * * = getchar();
***  * * *  * ****      **   *  = a+3;
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* *****  ** *** ** ****** = getchar();
**    *  *** * **  ** ****  *  = b+3;
**  *  *   ***  ***    **** *
*  *  *  *   **    **  * *  = getchar();
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**   **   * **  * * *  ****  ** *  * *
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*****  * ****  ***  **  ** ** = getchar();
          ***    *  ***** ** = e+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 * *    {
/*
**  *** ** */

 **     **

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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   * *  */

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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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*
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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 ***** 
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*  * * *  ****   char * ***
* * **   ***** * 
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**** **     *  ** 
*  **   * *     ** *  ** * *  ** **  ** *   **  **    **** ***   *   * **  *  ****  *     *   *** *
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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    *
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* * *    *  * char *   
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**  *  *  **  *    * ** ***** *  ***   *   *   *   * *   **    **    **    *****     ***  ** ** *******
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* **  *     *** ** ****** +3;
*  * * **  **  ** * ***** +3;
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**    ** *  * ** 
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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 ** *
 * **  ** *    * 
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* **** * *        
 **** ****** *    ** *  *  *       *   *  * * *** ***** *** **     *  *** *    * ** * **   ***  ***** 
 *  *  *  * *** * 
 **** * *   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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