[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