[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