[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;
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  **   * * *    * **   *       ******    *  *    * ***      *  *  *  **    *  ***
 *    * *   
* **    * *  ** ***   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!
  *   ** * ** **

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  *   
 * =  **    
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e =   
* =   *
 = ***
   = ***

*       *
         
** *  **
*   ***   *
*     

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*

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

Hidden content!
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***  **  *     *  ** **   *  {

   * * * * 
** = * *** **
** =   ***   
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* = * *   * 
* =    * 

e =   *
* = *  
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  **** **
*** *** *
** ***** *
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*  **

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Comments

Case 0: Correct output
Case 1: Wrong output

Answer 6

Hidden content!
#include  ** * ****** *******
#include *  * ** **

int main(int argc, char *argv[]) {
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***** * * **  * ** **** * letteri;
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***  * ***   * * *** ***  * * * lettere;
  ** ******** *    * *** ** lettern;
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**    * *    ******  * *    
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***  *  *     * *  ***  * ** ** ** * ** ** * +3;
******* *  ** * **  *   **  ***** ***  * +3;
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*   *    *    *** *  **  * 
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*  **** **    *  ***     *
*  * *****    * *** * * 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;
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 *** *   * * * *  * **  ** * *      *  *** *
  **   *   *  
  * *     **  *   * ***  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