[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.5k 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 | 4.5k 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:172.69.17.49
©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 | 705 views
12,783 questions
183,442 answers
172,219 comments
4,824 users