[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
8.1k 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 | 8.1k 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:172.71.120.75
©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 | 1.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users