[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 | 5.2k 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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}
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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* ***     ** *      **** *        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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}
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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 + *

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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   ** ***  ***
*  **  **** *** 
** *** ** * *  * * ******* *        *********** *  ****** *  ***   * * * ***    *  **** ******
* **  * ***   *  = *  * + 3;
***  ** *   * = *    + 3;
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* *** **    ******  letterc = **  * + 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;
**   ***  * **   char *  ** 
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**       * ** * char *** 
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* *    *   ** ****   ***    +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 *****  *
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**** *  *     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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