[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

內容已隱藏
#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

內容已隱藏
#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

內容已隱藏
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

內容已隱藏
** *     *** ****    * 

 **      *   **  *   **  {

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

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

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

*  * *          * **   * *** 
*

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

內容已隱藏
*  *** ** *** **    *  

**  *  *    * * *  ** * {

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

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

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

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

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 6

內容已隱藏
#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

內容已隱藏
**    ** *  ** ** *  

int   *** * argc, char  *  {


 *** ** *  **  char a;
  * *  **  *******  ***    *    ******   * *   char b;
   ** *     * *  **      * *  ** *** 
  **  * *    **** *****  ****** *    * *  **  *  ****     
* ****   * *  *  
 *  *  * *       **   ** the *** how??
 ****** *   *  ** ** 
  ***     **  **  * *  ***     ** a,b);
**** *   ** * * 
**  ** * ***** *** 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

Answer 8

內容已隱藏
#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

內容已隱藏
*  *   *  * **  *  

*   ***   *   ****  * **  {

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

內容已隱藏
#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