[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
3.7k 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 | 3.7k 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:172.69.6.101
©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 | 556 views
12,783 questions
183,442 answers
172,219 comments
4,824 users