[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
5.6k 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 | 5.6k 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:104.23.187.20
©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 | 855 views
12,783 questions
183,442 answers
172,219 comments
4,824 users