[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 | 4.4k views

22 Answers

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Hidden content!
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int *    argc, char  **  {
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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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**    * *** ** ** ** *     ****  b;
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*   *  *  **  * **        * = a+3;
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** *  * * * * * ** *  = b+3;
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***  *** * * ***     * = e+3;
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* **  *      **  *  ** **  *
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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!
**   * * *  **  *  *  
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int *     * * char  *  *  {
/*
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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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}
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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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*** ***** *     *** = **  * + 3;
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*** ** * ***     = ** * + 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   ** 
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* *  * *    
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******  * **  **    ******   +3;
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** ** ** ***  *  ****    *** ** * **  *****    **  *    *  * 
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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 **      ** * ** **
 * **   *    
        ****** **   * *** ***  **** *   *  *     *  * * ***      ****  *     * * *  *   **  *  **
*    ** *    ** 
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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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