[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