[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