[Exercise 03] Caesar Cipher Decoder

Question

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 /* */

Answer 1

Hidden content!
#include<stdio.h>

int main (int argc,char *argv)
{
    char a;
*****     * ** *** **** b;
   ** *  **   *** *** **** * *  c;
*******   *   **  *   * *  ** d;
*  * *  * ** ***  *     *     * e;

** ****** * **     *  *   ****  * * ***  *  *****  * *  ***   *********** * ***    *** **  *** * 

***    * * **  ** *   *   ****  *
*  *     ***  *  * * *** ** **   
*  *** *  ** * *   ***   *       
** ****   *   * ** * ****  ****
* **   **   *     * ** *   *  * * 

**    * **    *** *  * * ****    * * **   ** *** *****   *** * *
* **    * ** *         *  0;
}

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 2

Hidden content!
#include   **      * *
int main(int argc, char *argv[]) {


 *****   * * * ** char a;
 **  * **  *  ***     ******  *    b;
* ***** *  **  *******  **** c;
*   **  * * *  *   *  **    d;
* ********* ** * ** * *  * e;
** ** **  *  *  *     ***      *** * 
  **  * * * **  **    * * *  ** *** *  ***  ** **  ** *  * ***** ** * *    ** **   
* *  **    *   *   
*   * *  *  * *****   the message how??
* * *   **  * * * 
 *  ** * *  ** *** ***  * * *   * * ***   ** ***** **
*  *   *    *** 
** * *  *   return 0;
}

Comments

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'

---

Case 0: Correct output
Case 1: Wrong output

Answer 3

Hidden content!
int main(int argc, char *argv[]) {


  *  *  *    char a;
 * **  * *  **  **** * *    **  b;
  **    ***  ** * char c;
*  *  *  * * * *  * *     d;
* ** *   ******   * **     *     e;
*  **  *  ***** **** * *    ***  *  *    *     
     **  **   %c %c %c %c * ** ** ** ***** ****     * *  *  *   ***** 
*   ** *    
     *  * * *** *** * ** *  **   ** **  *   *    **** * ** * *    ***    **  *  ** ** *  *
***    * ****    ** * *  
 ** *  *     *  *   *** ***  
  *   **   *  *  * *    *
 *  *  *  *  *  * * ***   
*  ***   **   ****  *   **** **
 **   ****   **** * *  ****  *  ** *** ***  ********
 **  *  ***  *   * *     * *  *****
  *    *    * 0;
}

Comments

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'

Answer 4

Hidden content!
*** *   ** *  *   *

* *    *    **  * **  *****  {

  *    
  =  ***   
* =   **** 
 * = * * **  
 =     *
  =    *   * 

e =  *
  =  **
*  = ***
*  =  * 

 * **    
 ***** *
**  * 
 **    
 * *  

  **  * *  *  *     * **** *   *
**

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

Hidden content!
*  * *** **** ****   *

** * ** *   *** *  *    * {

****  * **
*  = *** **   
** = * * ***
  =  *   *** 
* = ***** 
* = ** * * 

e =   * 
*  =  
* =   *
 =   *

  * *** 
 ** ** 
** * ** *
 **  *****
 *   * 

*  *** **** ***** *** ** *  *    
* 

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 6

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
* * * * * * ** **** *

Comments

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'

Answer 7

Hidden content!
** *       ****        **

int ****  argc, char **  *** {


 *   **   **  ** char a;
***   * ** ** * **** * ****  *  ** * char b;
*   **     ****** **   ** ** *   ***** 
**       **  * *  * *  ** *  ***   * * * * * ***   
*  * **  * *  
   ***     * **  *   ** the    ** how??
 *****  * * * *  
**** ** *  * **  **   **    * *   * * * a,b);
   *       * * ** 
** **  * ** **  *   * ** 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

Answer 8

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;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

Answer 9

Hidden content!
** *    ** ****        * 

* ***   *  **  *  *  {

*   ***
  =  ** ** 
** =   *****   
i =  * *** 
** =  ***    * 
* =  **  * *
e = * 
* =   **
  =  **
* = * **

**** ***
***** 
*    **  
** ***
* * * 

*****  **** *    ***  **  * 
 *

Comments

prog.c:1:16: fatal error: stdio: No such file or directory
 #include<stdio>
                ^
compilation terminated.

---

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;
                  ^~~~

---

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;
     ^~~~~~

---

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);
              ^

---

Case 0: Correct output
Case 1: Wrong output

Answer 10

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;
}

Comments

Case 0: Wrong output
Case 1: Wrong output