[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