[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 | 8.8k 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;
* *      ***  ***   * * ** *  *  c;
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* **  ***  ***  * * *  * **
*  ** *   **  * *  ***  *** **  = getchar();
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*  *     *   *    * ********* ***
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****  **    ***  ***** *** ** = b+3;
***  * *****  *** ***    *  *
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***** *    *  **  * * *****   = c+3;
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  * ** * **  *  *  * * * **** = e+3;
* *** **   *** ** ***   * *   * ****   * 
    *   * *   ***  *  *    *   **    **         *  
*   * ** * ** **** * *** ****     *    **   **   * **  *** &a, &b, &c, &d, **  * 
** ** *     * * *** **  * *  *
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* * * **** *  *    * ** **   * *   * *** ** * * *** ** * a, b, c, d, e);
    **    * **  * *  ** 
***  * * *** ** ***** * *       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!
*  ** ** * **  **    *
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int   *  *   char   * * {
/*
*** * * *  */

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a = a+3;
b =  
c =  * 
d = d+3;
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*     the * ** * ** *
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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 *** ** {
**     *  *       int num,   
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}
* * ** *   **  ** * *     * **  ****     **
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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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*  =     
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  * = c + *

**  = d + *
 
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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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 **        *    ** **** * *  input the letter to * *  **   ***
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*  ** *  **  **  ** *** *   ** ** *  *   *     *  ***   * * *** ** *   **   ** * * * * * **   * * *** 
*** *** *     * * =      + 3;
  ** *** ** **  *   * = **  ** + 3;
  *  * ****   * *** = * *** + 3;
   **   * * ** letterc =  ****  + 3;
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** * **   * * *  
* *   ** ** ** * *  *  *  * *****  *      **  **  *    ***    * **  *
*    * *  * **   
**    ** *    *    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 * * *
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** * *    * * 
*   **    *  ** * * **** **** input the letter to encode: * * ***    *** *
   **    *  ** *  
* ***  **  *     **** ** *   ******  *  * ***   *  *             *****   * * *   ** *  * **  *** * * *****  *    
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   **  * *   *    ** ***    +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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