[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
7.2k 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 | 7.2k 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:172.70.50.50
©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 | 1.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users