[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
6.4k 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 | 6.4k 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:172.69.130.70
©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 | 960 views
12,783 questions
183,442 answers
172,219 comments
4,824 users