[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 | 4.5k views

22 Answers

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

int        argc, char      {
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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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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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*** **  *   **   * *  = a+3;
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*  ***    * ***         *     * = c+3;
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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 **** **  */

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