[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
9.3k 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 | 9.3k 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:104.23.243.109
©2016-2026

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 | 1.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users