[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.3k 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 | 4.3k 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:172.69.6.196
©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 | 676 views
12,783 questions
183,442 answers
172,219 comments
4,824 users