[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