[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