[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