[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:172.70.127.115
©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