[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 | 1.1k 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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**** **  ** * *     ** *    **  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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b =  **
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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!
   *  ***** *   ***** 
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/* run this *  * * * * the ***    *  or add your own  *   ** **** ** *  * **    or *  *  */

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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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*
**
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  **  
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** *      *  * * *  ** *  * *  input the letter to  *** * **   * 
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*   *** **   * *  *  = ** * + 3;
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* ** *    *    **** * ***  *   *  **  * **  * ** *****  *   ***  ***   *** **
   **    *  ** 
   * **  ***  * 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;
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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   ***  *
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**     *  *** char   *  * 
**    *        char   ***
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*** ***   **    
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*  ******   *  *  = *     * + 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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