[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 | 1k 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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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[]) {
  **  ***  **     *  ** *  *     a;
 ** ***** ***  * ** *****   * * b;
**   **   ** **   *** *     c;
*  **  *  ****** * ** *  *      * d;
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*** * *** *** * *      ***  *  
    *****  ***     ******   **  * ** **   the words you want to      * *    *  
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*      *    ** *  * *  *** = getchar();
*  *** **    ***     ** = a+3;
 * ** * *** * *** ** *    ** **** **
*** *   * **     ** ** *** *  *  = getchar();
           ***  **** *    = b+3;
** *  * * ** ** ******  *   **  *
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   * *   *  * **  ***** *  ** = c+3;
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*   * *   **  *   ** *  ***** = d+3;
**  * *******   ** *   **
 * *** *       ** * **  = getchar();
  *****  *****  ** ** ** ** = e+3;
* ***  **** *  ** * **  ** * * **   *
*    **  **  * *  *  ***  *  * * ***  ** ****   **      * *** 
   **   ** * ** *  * *** ***  **** ** **   ****  *  &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  *       *
    * * * * ****   ** 
    **  **  * ****   *  * *   * * 

** * * *  *      *
   * **  *       *** *           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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* * * b + *

* * = c +   

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