[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 | 9.7k 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      ** **   ** * 
#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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}
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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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 + *

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