[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
10k views

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 | 10k views

22 Answers

0 like 0 dislike 
Hidden content!
#include<stdio.h>

int main (int argc,char *argv)
{
    char a;
** *  *   ** **** *** *   ***** b;
 ** *  ***    ****  * *  *  c;
 * ******  *   * * * ** ** *  d;
**    **    **   *   **** *  e;

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

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

   *  *   *    * *  ** * **** * ** *   *  *  **  **** 
**  * * * * **   *****  *   *    0;
}
100/100 answered by (244 points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include * ***  * **** *
int main(int argc, char *argv[]) {


* ** ***  * *  char a;
  * *  *  * *   ***  *   * ***** b;
** ***  * ** *** *  *   *   c;
**   * * ***   **  ** * * **  d;
* *** * *  ****  *** ***  ***  e;
** *       *  **  **  ** *      * **  * 
*  * *     *     * ** *         * *****  *  ***    ***   *   * *  ******    *    * 
** **  *  *  
**** *   ****     the message how??
 **  * * * *  
*  *  ** *** * * ** *   ** *    ***** * * ** *  * * *  * *
   *  *** *  *** 
*** **  **  **** return 0;
}
100/100 answered by (221 points)
0 0
prog.c: In function 'main':
prog.c:10:2: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
  scanf("%c%c%c%c%c", &a, &b, &c, &d, &e);
  ^~~~~
prog.c:10:2: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:10:2: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:14:2: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
  printf("%c%c%c%c%c", a+3,b+3,c+3,d+3,e+3);
  ^~~~~~
prog.c:14:2: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:14:2: note: include '<stdio.h>' or provide a declaration of 'printf'
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!
int main(int argc, char *argv[]) {


*  *  *    char a;
 ** * ** **  *     *   *    ** * b;
 *      **  *   char c;
**  *   *** * * * * **   ****  d;
******    * * ** ** * *** * * * e;
   **** **  ** *  *****  ** **   * * * ** *  *   
    ****  ******   %c %c %c %c * **  *    ******      * *  * *** *** ***    ** *
*   ***    
    **** ****   ********     **  *** ** *  ** *     * ****** *    * * * *  * **  * ***
 ** *  ****  *  ** *    **
  *  ** * *    **        * *     * ***
    *****       **** **
** *   *  *     ** * *
* *     ** * *****    *   
* *   ******* * ***** ***     *  **      **   
 *** * * * *  * *  *    * 
 * **  ***   *   0;
}
50/100 answered by (244 points)
0 0
prog.c: In function 'main':
prog.c:10:2: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
  scanf("%c %c %c %c %c %c", &a, &b,&c, &d,&e);
  ^~~~~
prog.c:10:2: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:10:2: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:10:25: warning: format '%c' expects a matching 'char *' argument [-Wformat=]
  scanf("%c %c %c %c %c %c", &a, &b,&c, &d,&e);
                         ^
prog.c:12:6: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
      ^
prog.c:12:12: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
            ^
prog.c:12:18: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
                  ^
prog.c:12:24: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
                        ^
prog.c:12:30: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
                              ^
prog.c:14:2: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
  printf("hello");
  ^~~~~~
prog.c:14:2: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:14:2: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:18:5: warning: incompatible implicit declaration of built-in function 'printf'
     printf("errol");
     ^~~~~~
prog.c:18:5: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
**     *  *****  

**   **** **         * {

 *  *     
  = ****  
  = *    *
* =  ** **  
* =  * *
 * =   ****

e =    
   = * 
 = * 
   =   

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

*        *****  *   *  **      *    *
100/100 answered by (183 points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
*   **  **     ** *  

*   ** * *  *  *** **   {

 **  *****
   =     * *
* = * * * ** 
   =      * * 
*  = ****  *
  = *** **

e = * *
*  =  * 
** =   * 
* = * **

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

***       *   * * ****  * * *  *
100/100 answered
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include   **  * * *  
#include  *  *** ***  ** 

int main(int argc, char *argv[]) {
*    *   * ** ****  ** * *  * * letterj;
  ** **   *  *   * **  *   letteri;
** **    **  * *      * *** letterm;
 ** ***  **  ***     * **  * lettere;
*  * ****    * ** * *  * **   * lettern;
    *     * *** **  * **
    *******  * * *  ** *** * *   **** *** input the letter to encode: ");  
* * * * * ** * * ****     *
      * ** *  * *  ** * ***** *** ***    **    ** &letterj, ** ** ** **** &letterm,   ** **    ** *      
*    *  ** ** *****     *******    *  +3;
** *** *  *   * *   **  *      ****  **  +3;
    * **  * ** **** * ****** *   ** ** +3;
 **  *    * * *      **    *** ***   +3;
*   * *  *  *     * *   * ***   *  **  ** +3;
 ** *   * **  **       *****   
 *  *   * *  *** *  *   *     
** ** * *  ***  **  **   **   ***   ****  * * ***   ***    *      lettere, lettern);
 *** *  *     ** ** * *    ** * 
 **  ******   **** **  **** * *  0;
}


INPUT
 * *** *  *     
* **   *  ** ** 
OUTPUT
* *  * *  **  ****  **
100/100 answered by (243 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)
0 like 0 dislike 
Hidden content!
**        ** **

int * **** argc, char  *** {


  *   *   ** * **    char a;
*** *   **     * ** **  *   *****  ** ***  *    ** char b;
 **** *   *    * * *    * *   *  
 * ****      **  **   ***  *  **** *   *  *   * *  ** *   
****  *  ** *** 
** ***   ****  * *   the  * **  how??
 *** *    ** **  * 
 *    *   ** *   *    *  **    *   **** a,b);
 * * ** * ** **  
**    *   *      *   0;
}
50/100 answered
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include  ****  ****  *

int main(int argc, char *argv[])
{
 ** ** **  *     *   letterj;
* *  * ** ***   * * * **    letteri;
 *****    **  *  *  **  *  * * letterm;
 ** * ***  *     ** *  *  ** lettere;
    * *   **    * * *  lettern;
    **** * *    *    ******
*    **** ***    *  ** ** *   *   *  input the letter to encode: *  * * * * * * * *
 **  *   ******       * * ** **  *** ** **  * **** **   *** * ** **   ****   *     * * * **  *  ** **  ****  **  * *
**  * * *****  *  * * **      
****** *   *** ***** **** *   ** = letterj +3;
** ** *   *   **** ** *****  * ******  = letteri +3;
***      ******** *** *  ***   = letterm +3;
* *  * *  ****  * *** **** *  *  = lettere +3;
    *  ** * * ** **    **  **  = lettern +3;
    *** * *  * * * * *** **** *
 *   ***   * ***  *    **** *  *  * *  * * *** ****  * ***    ***** lettere, lettern);
**     *** ** * **  **  *****  

 *   *** **** ** 0;
}
100/100 answered by (220 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
** ** *  ****   

     * *    *** **    * {

  *  *    
*  = *  **
* = *  ** 
i = * * 
* =  *  *
*  =  * ***
e =  ***
* = * *
*  = ** 
 * = * 

*  * 
  *  *  
   ** * *
   * 
**    

* *** ****  *   *   *** **  **
100/100 answered by (283 points)
edited by
0 0
prog.c:1:16: fatal error: stdio: No such file or directory
 #include<stdio>
                ^
compilation terminated.
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:6:5: error: 'cin' undeclared (first use in this function)
     cin >> a;
     ^~~
prog.c:6:5: note: each undeclared identifier is reported only once for each function it appears in
prog.c:11:5: error: 'cout' undeclared (first use in this function)
     cout << a << endl << endl;
     ^~~~
prog.c:11:18: error: 'endl' undeclared (first use in this function)
     cout << a << endl << endl;
                  ^~~~
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:6:11: warning: too many arguments for format [-Wformat-extra-args]
     scanf("c", &a);
           ^~~
prog.c:11:14: warning: format '%c' expects argument of type 'int', but argument 2 has type 'char *' [-Wformat=]
     printf("%c", a)
              ^
prog.c:12:5: error: expected ';' before 'return'
     return 0;
     ^~~~~~
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:6:11: warning: too many arguments for format [-Wformat-extra-args]
     scanf("c", &a);
           ^~~
prog.c:11:14: warning: format '%c' expects argument of type 'int', but argument 2 has type 'char (*)[5]' [-Wformat=]
     printf("%c", &a);
              ^
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!
#include  **** *     *
#include *** *   *  **

int main(int argc, char *argv[]) {
***  ****  ***  *** *      *  letterj;
  ***      * **** *  ******  **  letteri;
  * * * *    * * ****** ***  letterm;
   * * ****** * **  *    *  lettere;
****    *    * * *  ***** ** lettern;
*   *          *   *** ***  
  *    * **  *  * * * *    *  ***   *  input the letter to encode:   ** ***   
 * *** * * * **      *  **  *** *** ** *  ***     ** ****   **   ***   ****   * ********* *  ** ***     **** **** **    ** *  * **    **  *  * * ***   ***
 *  ****** ***  ***** **  
*** * * * **  letterj = letterj +3;
*   ***** ***    *  * **  = letteri +3;
*  **  ***     * **   * * *    **  * = letterm +3;
  * *  **   * * ****  **   *       * = lettere +3;
   *****   ********* ** *** * **   = lettern +3;
***** **  * ***   * ** *** **
 * * * *   ** ****  * ***  ** ****   *  **  *   ** *   * ** * **  ***** * *   *    ** lettere, lettern);
 * *     *   ** * 
 *** ** * *** ****  *******   ** **** 0;
}
100/100 answered by (220 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:104.23.197.94
©2016-2026

Related questions

0 like 0 dislike
2 answers
Shifting backward
[Normal] Essay (Open question) - asked Dec 12, 2017 in Chapter 2: Syntax structure of the C language by 許哲瑋 (449 points)
ID: 37081 - Available when: Unlimited - Due to: Unlimited | 1.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users