[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