[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
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 | 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:172.70.100.33
©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 | 425 views
12,783 questions
183,443 answers
172,219 comments
4,824 users