[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
3.7k 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 | 3.7k 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:172.69.59.239
©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 | 556 views
12,783 questions
183,442 answers
172,219 comments
4,824 users