[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 /* */

Show more...

Answer 1

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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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/* 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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}

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 = ***

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*   *** * **   ***
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}

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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***    *   *      for ** =   * *        
{
*   *  * *** *       = **   *
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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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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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**    * ** **** * * * 
*  ***  * * * * * * 

int   *  argc, char  * *  {
   *  **   ****  * char   * *
*   ** *      **** char ******
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****     * *      *    = *  * + 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 * ** **
* **   ** *  *   char **    
***   * ** *   char   *** 
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*** *** *   * 
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   *** ** **      ***  * * +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   **  *
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*    *    * *  ** 
****    **  * * ** *** * ** * **** ****  ****     *   ****  **    *** ** *  ** **** * *  * * *  ****** ****  
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 ***    ****  *** = ** * + 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  * * ** *   * ***  * **  **  *** *   **   *  **   * *  *   * * * **  * 
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* ** *** ***  * *********      = 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'