[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 | 4.5k 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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*   ******* * *    ** ** = a+3;
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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!
   * * ***   ** *    *
**   * *       **     

int **  * **  char ****  * {
/*
*   **    */

**    ***   * 

* **  ** **** ** * *   * ***   *    *  *   *  **  *  ***** * *  *   **
a = a+3;
b =  **
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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 * * ** {
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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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* * = c + * 

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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 * * ** 
 *    ** * * *  char ****
* ****   *  ** *  char *  * 
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*******  **  *  char   * **  
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** ** ** *     *  = * **   + 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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*** * * * *  *  
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*   ** * * 
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* * *  **   * * * **   +3;
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*  ** *   **    *  ** ** *  +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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