[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 | 8.7k 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  *** * **   *   
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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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**  * b +  

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*** = 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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* **** *** **   **    *  = **    + 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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*    * *   *  **  
*         ** ** * *  ***  **  input the letter to encode: * ** ** * *
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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 * *** 
*  *  * * *   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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