[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