[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 | 4.3k views

22 Answers

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

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