[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

0 like 0 dislike 
Hidden content!
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int * *  *  argc, char   **** {
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***        ** * 
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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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***     ***    *  ***  *** * * = getchar();
*  ** **      *   ****  *   ** = e+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!
    *** **  **** * * 
*** *   *    **  **  

int   *  *   * char *    * {
/*
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b =  
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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 ***   ** */

int   **    * char **   {
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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  *  **
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*  *   * * * char * * **
 *  * * ***  char     * **
      * * * * **  
* ****   *   **  * *   ****    input the letter to   *   * *
   * *        *  
* ***   ** ** ** **  ** **  ***    **  **   * *   *** * *     * ** *** * * ** **   *    * *** 
**   ** * ** *    **  =  *** + 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    *  
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    *    * *    *** *    * * input the letter to encode: * *     *   *  ***
*  *   ***  
* *  * * ******   ***   *** * *  *****   *  * *       ** *    *       *        **  ** *   **  *
    *    ***  **** ** ** +3;
*      * *      *  *  +3;
  *       *  *    *** **  *  +3;
*****  * * * **  *** ** *  +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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