[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
2.4k 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 | 2.4k 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:172.69.58.130
©2016-2024

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 | 343 views
12,783 questions
183,443 answers
172,219 comments
4,824 users