[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