[Exercise 03] Caesar Cipher Decoder

Question

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 /* */

Answer 1

Hidden content!
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}

Comments

Case 0: Wrong output
Case 1: Wrong output

---

Case 0: Correct output
Case 1: Wrong output

Answer 2

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Comments

Case 0: Correct output
Case 1: Wrong output

Answer 3

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#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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* ** **  **    *     *******    *
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*  *  *   *   **  *  * *  **   * = getchar();
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* * * *   *  *  *  ***    * * ** * **
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}

Comments

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.

---

This exercise expects only 'hello'. However, your code has.....

printf("Put the words you want to decode:");

Kindly consider delete this part :)

Answer 4

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* *  **  * *** * ***
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int * *   *  * char **** {
/*
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a = a+3;
b = ***
c =  *
d = d+3;
e = * 

** **   the       * *
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* * ****   * *   * **
*  *** * * ***  *****      ***  * 0;
}

Comments

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'

---

Your program can end at
  
    return 0;
}
------------------------------------------
You don't need to put

INPUT

ebiil

OUTPUT

hello

---

Case 0: Correct output
Case 1: Wrong output

Answer 5

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/* run this **    *  the ** *    ***   or add your own * **  *** * ***  ** ** *  or *      ** */

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{
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** * * *  *****  * * ** *   
}
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  * **  * *****   * **  0;

Comments

prog.c: In function 'main':
prog.c:19:2: error: expected declaration or statement at end of input
  return 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.

Answer 6

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* * * b +  

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Comments

It's correct lol you can't judge me

---

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.

---

printf("%c%c%c%c%c", a1, b1, c1, d1, e1);

How's that?

---

That's correct.

Answer 7

Hidden content!
***   **    **** 
***     * ***     * *   

int ** ** argc, char   *  ** {
 **** **  * **** char *  
* ***   * ** char ** ***
   *** *** char ** * 
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   ** *   * * ***  * =  *  + 3;
** *  ***    * ** ***  = *    + 3;
*   ** * **   *  ** =  ** + 3;
 * **  *  *  letterc = **  + 3;
*       * * ***  *** = * *   + 3;
   **  * **  
** *    * *** **  * *  ** ***** ** * ***  *** ** *     ** *       *  *
* *  **    **  * 
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}

Comments

-----------Re-judge-----------
Case 0: Wrong output

---

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.

Answer 8

Hidden content!
* ** *   *   *  **  **  *
 *  * *   ** **** 

int *   argc, char *argv[]) {
 ****** *  ** char  * ** 
  ** *      char letteri;
***     ***  **  char       
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 * **** *  *** **   char **  
** *   * * *    
*   *** **    *      *  * **  * input the letter to encode:  **     ***  
 *    * *  ***  * 
  * *       ** *   * ** * ** **    * ** * *   * ** * * *  *  * ** **** *  *      ***   * *   *** ** *   * *** * 
** **       **  *  *** +3;
*  *** * *   **   ***       +3;
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 *** **  ***    * ***** ** +3;
   ** *   **** *   * ****  * +3;
*      *  *** ** 
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*              * *     *  *   *    *  ****  *  ****   *   ***    *  *
*****  * ***   * 
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}


INPUT
*** **   ****  * 
  **  **   
OUTPUT
     * *   **

Comments

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.

---

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'

Answer 9

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

Comments

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.

---

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'

Answer 10

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

Comments

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.

---

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'

---

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'