[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 | 4.5k views

22 Answers

0 like 0 dislike 
Hidden content!
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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[]) {
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  **  *  *  ****   * * *  *   c;
*    ** **     *  * *  * *   * d;
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** *  ** *   ** * * * *  *** = getchar();
** *   ** ** *** *** **   * = a+3;
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* ***   *   *   *    * *   *  = getchar();
* **** *  * *  *    ***** = b+3;
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* *  *** *  * **    **       * *  *
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***  * **   *  *    * **  ** * = getchar();
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* * * *  ** * *  **** **  *  *  * **  
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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    * * {
/*
* ** *   * *    */

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

** ** the      *
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*   *** * * * *  ****  *     *

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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 ** **  */

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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 + *

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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  * 
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* * * *  *  **  ***   *** * * * * 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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