[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:172.70.126.96
©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