[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.3k 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 | 4.3k 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:172.69.6.196
©2016-2025

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 | 676 views
12,783 questions
183,442 answers
172,219 comments
4,824 users