[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