[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