[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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* ***  
**  ****  
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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