[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 | 4.7k views

22 Answers

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

int    **  argc, char *    ** {
***  **  ** *  *     * * */

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}
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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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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*** * ** ***  *  *  ****    c;
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****   ******  * *     *    ** **  *  = b+3;
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**    *   ****** * ***** *    = c+3;
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*      **   **   ***   *  = d+3;
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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;
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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 ** * {
*       * *    **  int num,  * *
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{
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* **** ** * *    *** ***   
}
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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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**  = c + *

** = 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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  * **   * ****  ** *        * +3;
    *   **  * * 
 * * ** **  **  
  ****  *   * * * *   * * ** *  *** *    *  * *   *         * *** *   * ** ***  ** 
 *  * ***** 
* ***   *  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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