[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, ******    ** *   *** * ***  
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 ** * *** **** * *    ** *  **  * *** +3;
***    *** **** * *      * *   ** **** +3;
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* ***** *  *  *  ***    * * * *
* ** * ****  *    ****   *  **  *** **   *      ** * *  *   * *    * 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