[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