[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