[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 | 4.8k views

22 Answers

0 like 0 dislike 
Hidden content!
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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  ******  ** 
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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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}
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 ** *  ** */

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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 + **

* = d + *

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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;
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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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* * * ***  ***     * 
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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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   * * **   * 
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* ** ** ** **   
**   * *  * *    *     *** *** **      **  * ***        * ******* **   ***   *  *** * ***  * **** *  
  ****  *   **** 
  *** * *  ** * * 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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