[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