[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.7k 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 | 4.7k 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:172.69.58.93
©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 | 736 views
12,783 questions
183,442 answers
172,219 comments
4,824 users