[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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*        * *    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 * **    * * ***

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int main(int argc, char *argv[]) {
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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!
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int   * *  * char ****** {
/*
****** ***      */

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*   ****     * * *   * ** * * *       * ***** *   **       **  *
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}
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!
 *   **  *  *    ***
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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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* = 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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*    *       
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**  *   * *  **    =      + 3;
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**  * * ** *     
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    *  *  *   
* *  **   *  *** 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      
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**  *   **      **  ***** * **  * **  ***** *** **  *** *  *** * **  * *    * ***  **   * *   **** 
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* *****  *  **   *   * **  +3;
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**** ***  * *  * *  **  *  * +3;
** *     ******  *   * **   *    +3;
**      *** * 
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**  *   ** *   
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}


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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        * * *    ****** * ** 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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