[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