[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