[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 | 9.3k views

22 Answers

0 like 0 dislike 
Hidden content!
**** * ****** ** * 

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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*
** * ****        *    **  {

*   ** 
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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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*    * *   * **   * * **    * *   * e;
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* ** ** *   *** *   *  *      = b+3;
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*  **  ***** *  ** ***  *   = c+3;
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* **  *     *  * ****** *  **** ** ***** ** ** *** *** &a, &b, &c, &d, *    ***
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  **** **  * * * * *  *  * **  * * 
** ***   * *   * * **   * * *** *****  0;
}
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!
 ** * ** *** ******  * 
 * *** * * ** ** * *****  

int  *  **  ***  char *  *** {
/*
* *   **  ** * */

    **  *

*  * *  ***   **** **** *     *  *    ***** *   * **   *   *  *** 
a = a+3;
b =  *
c =  
d = d+3;
e = * 

*     ** the ***   * 
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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   * ***  */

int   *      char ***    {
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* **** *  **  ***  *   * 
}
**  **  *    *** *** **  ***  *  * *  **
**** ***    *****  ****  0;
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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*
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* * b + *

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  = 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 ** 
*    **    ***  * char *  ** *
*  ****    * *  * char  * * 
*  * * ****** ** char **  
     **     
*  *   *** *  *** **   *  input the letter to  * ***    **
**     ** 
 *** *  *****  * * ** * ***  *********  *  **  * * * ***    ****       * *  *  ** *  *** * * ** *   ***
  ****      * *         =    * * + 3;
  ***  * * *    **  =  * *** + 3;
**** * *   **  *     *   = **   * + 3;
***     * * * letterc =  ***  + 3;
** * *      *    * *  * =   **  + 3;
**  * * ** ** 
 * ***** **  * **   * ** *  ***   **  * *   ** ***  *  *  **   *
** *  *      *      
    * *    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   **
* ***   **   
* **  **    * *******  *   * * input the letter to encode: **   * *  * **
 *  **   *  * 
***** *  *  *** * ***    **   ***        ** * *** *   ** * *   *  *   ** **   ***     *  *    * ** 
*  ***  ***  *  ** ** +3;
***  * *   * *  ** ****  +3;
** **   **  *     * *    *  +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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