[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:104.23.187.20
©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