[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