[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