[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!
**   **    ***

  ** **  * **  * * *** * {

**  ** *
   =   * *   
** =  *  * *
  = ** ** *
   =    * ** 
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e = * 
   = ***
  =  * 
 * =   * 

* **   **
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**** *
***  ** 

*  ***   *******  * * **    *
 *

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