[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
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 | 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:172.70.100.162
©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 | 764 views
12,783 questions
183,442 answers
172,219 comments
4,824 users