[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