[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 | 4.4k views

22 Answers

0 like 0 dislike 
Hidden content!
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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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***     **    ******  ** ** = a+3;
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*  *  ** ** ****  *  ***** * = b+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!
 ***** * * * ***    **   *
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int **    *  char ****  {
/*
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* *  ***  **

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a = a+3;
b =  **
c = *  *
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 ** **   ***  *  * * ** *
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}
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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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 *** 
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***  *     *     char * * 
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*** ** ** * *** *  *** * ** * **** input the letter to  **   * **
     *    ***** 
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  *   *   *    **    =  *    + 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  **  
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**** ** * *     * char * *   
* ***  * *     
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** * *   **  
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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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