[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 | 3.5k views

22 Answers

0 like 0 dislike 
Hidden content!
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int **    argc, char * ** {
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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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}
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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b = **
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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!
 *     ** ** * ** ** **
* **** *    ** *  ** * *  

/* run this   * ** *   the  * * * * or add your own *** * ** *  * ** *  * *  ***   or ** *   */

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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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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    * *
         **    char  ** 
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*** *      ***       ** = *   + 3;
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***   * *  *  * *** = *** * + 3;
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** *        **  *   * = * * * + 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;
*  ****  **   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 **   
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*  *  **   **** char ** *
*    *    **   
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*     *      *   letter = letter + 3;
*      **   * **** =   *   + 3;
**** **  ***  ** * =  **  + 3;
*  *****    ***    * *  = *   *  + 3;
* ** **  *** *   * *  = **  + 3;
   ***    **  * 
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  ** *      
**  * * *   *  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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