[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 | 3.5k views

22 Answers

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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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a = a+3;
b = *  
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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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}
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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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*  = 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    * * 
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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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}


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