[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