[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

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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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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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**    *  *    *  ** ** = c+3;
**    *** *  ***** *  **     *  
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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  * **    *  
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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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*****   **** **  **** 
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int *  *** char *** {
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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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* *  *    **  * *     * *    ***  * ** *  *  *   ***** * *  * *   * *  ***

*  =  *  

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*  = c +  

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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

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*** *** ****   **** *
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int ** ** argc, char  *   * {
***   ***  char * *  * 
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*  ***  ***    * **  = * * ** + 3;
    ** *  *****    *  = **    + 3;
**   *         ** *  = * **  + 3;
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**** *    *   *    **  =  **  + 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  * *** 
 * **   *    char  *    
   **** ** ****  char ***  
 *     * *  **  * 
**** *        **   ** * input the letter to encode: * **  * **   * *   
*  * *     *   
**    * *     **  **** ** * **  ***    *   *    **** *  *  * *   * ** * *  * * **   **       ** 
 * * *** * ** * ** ** ******  * +3;
 *       **  ** ******  ** +3;
*   *   *   **  ***    +3;
* **  * ***       ****  * ** +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!
 **  **     *   ** *** 
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int   *  argc, char *   * {
*  *  ****    char ** * 
** *    *  *   ** char  *** 
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*** ***  * * *** * * 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;
  *****  ******* * ***   **   **   *  * * **   ***   * 
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** *****     *   * **
  ***        ****   *   * * ** * * 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'