[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 | 1.1k 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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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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}
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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  *** *   * *

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a = a+3;
b = *   
c = **
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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)
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Hidden content!
 **   ** *  *  ****  * 
*
* ** * * ***      ****   
*
***   * **          **   *        *** * *  ***   ** * **** ******  *     * *   * * 
 
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*
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* = 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    * *
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**        *      *  **** input the letter to   *   * **
**    ** * * * *   
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****       * * *   * =   * *  + 3;
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* **    **     = *   * + 3;
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* *  *  * * *     * * = **** + 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  *  *
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** * **  *  * ** * 
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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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