[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
8.1k 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 | 8.1k 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:172.69.214.151
©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 | 1.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users