[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
5.9k 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 | 5.9k 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:172.70.178.44
©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 | 906 views
12,783 questions
183,442 answers
172,219 comments
4,824 users