[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