[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