[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
3.5k 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 | 3.5k 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:172.69.58.163
©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 | 497 views
12,783 questions
183,442 answers
172,219 comments
4,824 users