[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