[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
9.1k 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 | 9.1k 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:104.23.243.109
©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 | 1.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users