[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 | 5.6k 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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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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}
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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}
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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*  = 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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** * ***  ****  letterc =   ** + 3;
** ** ** * *  ***    ** =       + 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    **
**  *   * *** * * char * *
* *  *  **    
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**   *** **  ** 
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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      
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 ****  * **    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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