[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
10.3k 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 | 10.3k 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:104.23.197.65
©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