[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 | 5.6k 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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}
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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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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*  = 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  *****
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   * *   * **** * char * * 
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  **  *  * * * * *  ******* *       input the letter to *   ***  *   
* ** * *  *   **  
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* *    * ****** *     = *  * + 3;
   * ***  ** ***  letterc =     * + 3;
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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 **** **
 * ***      ** char  * *  *
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**  **   * *****  ** ***  *** * *  input the letter to encode: ****  *  ***  
  *  *   * ** * 
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* *    *  *    ****    *  +3;
****   *  *    **  * * *   +3;
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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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