[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.4k 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 | 4.4k 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:172.69.17.132
©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 | 705 views
12,783 questions
183,442 answers
172,219 comments
4,824 users