[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