[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 | 10.2k views

22 Answers

0 like 0 dislike 
Hidden content!
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int *    argc, char * **** {
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 * ** *    *    ** return 0;
}
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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* *  * * *  *    **  ** * **   = 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!
  ***** ****        **
**  ** * * ** * **** 

int *    * char * * {
/*
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a = a+3;
b = *
c = *  
d = d+3;
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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!
**** ** **   ** * **  
*        ** **  *  * * 

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