[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;
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 *** * *   *** * ** * **  *****   e;

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

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

* *****   * * * *** ***     **** ** **** ***   *****   *    *  
    *   ** *  *     *  *** * 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;
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*** * ** *  ****  *  * **  *   e;
* **         ** *     *** ** *** 
** **   **    *   * * *  *   **** *   *    * ** *  * * ** *    * ** *  **** *
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*  **  * * *   ** *   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!
** *** *** ***  ** * * 

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

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

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 *

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

Hidden content!
***    * *  *   ***

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***  ******
* =     *  
*  = *     *
*  = *  ***
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e =     
*  =   
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***  * *
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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;
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** * * *     **  *   ***  * * lettere;
****  ****     *   *  *  *   lettern;
* *  * *   **  * **   ** * *  
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****   ********   **   
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*  *****  *  * *  ** *   *** *    ** +3;
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** * ***  **      **  ***     * *
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 *** * * **    *  *    **   *
*  **  *   *   * * *  * ***   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;
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*   * *  ****    ** ** 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 = *
 * =  * 
*  = *  
* =  *  

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

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

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