[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