[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 | 6.5k 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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a = a+3;
b = *  
c = **
d = d+3;
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***   *** *** **    * **   *    *

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****   ** *    *** * *  ** * *  * 0;
}
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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**  = 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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* * **    * * ** 
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* ** **  ** *  letterc = *  *  + 3;
* * * * *       * = ***   + 3;
*  * * *   ** *   
 *        ** *     *     * *  *  ****     *  * **  ** * * *   * *** ***  * 
 *     * ***  *** 
*  ****   ** 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;
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***  * ** ***    ** ***   +3;
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** **  * ** ****  
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}


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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**  **  ** *  **   ** * *  * **  * *  * * *   ***   *   *   *  * * * **** *   *** * *   *  ** * *** 
* * ****** *  *  
  *    *    *  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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