[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