[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
3.5k 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 | 3.5k 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:172.69.58.163
©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 | 497 views
12,783 questions
183,442 answers
172,219 comments
4,824 users