[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
9.5k 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 | 9.5k 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:162.159.115.9
©2016-2026

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 | 1.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users