[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
9.6k 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 | 9.6k 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:104.23.197.94
©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