[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