[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
5.6k 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 | 5.6k 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:172.69.6.113
©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 | 855 views
12,783 questions
183,442 answers
172,219 comments
4,824 users