[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