[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