[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
10.1k 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 | 10.1k 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:104.23.243.108
©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 | 1.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users