[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