[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