[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:108.162.216.247
©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