[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 | 4k 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[]) {
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***** ***  *   **  **    **** c;
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* *    * * ***  ***  *** ***   = a+3;
* * *  ** * ** **  ** **  **  
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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;
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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  **    */

int  **  * *   * char    *  {
* ***  *   *** ** int num, * * 
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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  *     **
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**  *   *  ****    * **** **** *  *   * **  *** *  *    **  ** *   * **    **  * ********   ***  *
* * * **** **  * = ** * + 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: ** * *    * **
 *** *  *   *  
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** ***  ** *** * * *   ** * +3;
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  * *  *   **  ***  ** *  * +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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