[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 | 9.9k views

22 Answers

0 like 0 dislike 
Hidden content!
**  *    ** **  * ** **

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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** =  *
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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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** * **** * ** *       *  * * ****** d;
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*     **    ********  * **  = b+3;
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*  *  *  ** * *    *** ** = getchar();
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***  *   *   *** * *  * * = getchar();
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**** **     *   *    ******  **  *   **     ** * ***       *** *
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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 *    *  {
/*
  *   **** *  */

** ** ** *  

*   * *  *  **  * ** ****  *******  **  ** *  * ****  ** **        *  *
a = a+3;
b =   
c = ****
d = d+3;
e =   

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* ** *     ***  * 
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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   ***  {
*     * *  *    * int num, *     
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{
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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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*
*   *** * ** *    *   ** ****  ****   **** *      **          * *  *  *
 
** =    *
 
      b +  *

** = c +  *

** = d +   
 
    *   *
*
    ****** ***** *  *  **          

* * ** **
 
**
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  *  
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*   ****  ***  *    ***   ** * input the letter to   * **  ** ** ***
 * **  **** 
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**  **  * * ***  *    =   * * + 3;
 * * * *   * *   * =  * *  + 3;
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****   *** 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;
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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 *  ***
  ****  ***    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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