[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;
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  **   ** *  *** **  ** * * d;
*** *****  *  ****  **   * * e;
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  **   * *  ***  * *  *  **    * *  ****  * ***   **     * ***  *  * *   **    
****  * *  * *   
**   *** ***    *  * ***   the message how??
 *        ***  *** 
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*    *    ** 
***  * **  *   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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e = ***
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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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*  * ****
**   **
     

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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;
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*  *  *  * ** ***  * * *** ** * * *  *   * input the letter to encode: ");  
* ** **     * * * *   *** *
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*           *   **  ** **  *** ***  +3;
**   * ***   **   *   *  *  * *  *** * ***   +3;
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*  * ** * * *      ****  * *  ****   * *  *** ******** * ***  **   * ****   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;
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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 = * *
  = *  
  = ***
 = *

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

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

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