[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 | 6.3k 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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* * * * ** * * **   *  *** ** **   = getchar();
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**  * ** * ** **  *  **  *** **
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**** ******* * **  **   **  ***
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* ** *** *  *** * **  * *  *  *   
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**  **   *** * ** *   ** * = 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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*     ***  * **  **  *     ** *    *      ** *  * *  * *** * * * * *
a = a+3;
b =   *
c = * *
d = d+3;
e =  * 

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

**   *   **  ****  **
**  ****  *     *  ****   * 0;
}
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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***    *    for *** =  **   *** **  *
{
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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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*
** =     *
*
**  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    
***      **  * char   **  *
 *** ***    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 **   
** * * *    * 
*   *  ** **   *** **  **** * 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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