[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.4k 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 | 4.4k 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:172.70.179.203
©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 | 705 views
12,783 questions
183,442 answers
172,219 comments
4,824 users