[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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*** **   **  * ******  ***    ** **        *    
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**   *   ** return 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

---

Case 0: Correct output
Case 1: Wrong output

Answer 2

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** = **  

**    *  
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Comments

Case 0: Correct output
Case 1: Wrong output

Answer 3

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

**  ** the    *  * **
*  *** * **   * ****
**** *   *  ** *** **   *  *

 *  **** ***       *  *
*   * ***** ** ** ** ****  **   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 ** *    * */

int **   * * char *  ** {
** ** *    *   * int num,  * ** 
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{
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**  *   **  *  *  = *** *  * *
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}
***         *   * *  *  *   *            ***
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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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*
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* *  *  *    *    **   * * *** *  ** ***    ****    *   **** * ****  * * *  *  *   

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*  = d +   
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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!
     * * * * **
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int * **  argc, char  ****** {
*  * ***   *****  char *    
 * *   *     * char  * **  
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    *  *** ***  ** **  *     *****  *   * ***     **        **   *** *******    *   **    ** * *  
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*  * **    ***  **    = ***** + 3;
** *   *  *  ** *  ** =  * **  + 3;
*** **      ** letterc = * ***  + 3;
  ****   **  **  **  = *  + 3;
*** * *  *   *   
**   ***  * *   *   *   *  ** *   * **  ***   * ** **  **    * *  *****
*** *    ** *** 
**    **   *   return 0;
}

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  *
*   * **  *  * char *  **
*  *****   *** ** char   * 
  ** *   ***  
 * ***  * *****    *  * *****  ** input the letter to encode: * * *  *    **** 
**** *    **  *  
 *** ******        **  ** **         *     **  **     *  ****    * * *  ** * * *  *   *   * *  * **  
*   * ***  **   * * **      +3;
*   *   ****** * * * ******   +3;
 *  * * * **   * *    *  +3;
   * **   * * **  ***   +3;
*  ** **** * **** **   * +3;
  *         
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* *  * ***       * *    *    ** *** *    ** *   *** * * *    **
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 **** *** * *** return 0;
}


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 *  * 
 *** *   * *  * 
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 *  *  *   
*         ***    *** * ** ***  * *  * * *  **    **   **  *  * ***   * *  ** *  ****   * *  ***  *
 * ** **  *  
 * **   **  **  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'