[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.2k 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 | 4.2k 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:172.71.254.149
©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 | 658 views
12,783 questions
183,442 answers
172,219 comments
4,824 users