[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