even/odd program help

[Cornwallis]

I have to write a program to determine if a number is odd or even. I have written the program and it works fine. But my instructor told me I need the logic that determines if the number is odd or even to be contained in a separate function; as in, not just logic floating in the main function.
I'm new to C++ and have no idea what he means or what to do. Here is the original working code, Thanks!

// Even  and Odd solving program

#include <iostream>
using namespace std;

int main ()
{	int integer;
	
// Prompt user for integer and obtain integer.

  cout << "Please enter an integer"

		<< endl;
  cin >> integer;


 // determine if integer is even or odd


  if ( integer % 2== 0 )

 // if the integer when divided by 2 has no remainder then it's even.

       cout << integer << " is even "
	   <<endl;
  else  

	  // the integer is odd

       cout << integer << " is odd "
	   <<endl;

  return 0;
}

[muzhogg]

read these;

http://www.cplusplus.com/doc/tutorial/functions.html
http://www.cplusplus.com/doc/tutorial/functions2.html

Not only will it teach you about functions generally, but your question is answered directly in one of the above.

[Cornwallis]

I read those and I'm still a little confused as to what exactly I can do to change my code to include the logic in a separate function. If I declare another function won't I need parameters? Wouldn't it change how I solved it, or would I be using type void?

[sperva]

// Even  and Odd solving program

#include <iostream>
using namespace std;

bool isOdd(int integer);

int main ()
{	int integer;
	
// Prompt user for integer and obtain integer.

  cout << "Please enter an integer"

		<< endl;
  cin >> integer;


 // determine if integer is even or odd
     if(isOdd(integer) == true)
         cout << integer << "is odd." << endl;
     else
         cout << integer << "is even." << endl;

     return 0;
}

bool isOdd( int integer )
{

  if ( integer % 2== 0 )
     return true;
  else
     return false;
}

Hope this helps you better understand functions.

[muzhogg]

Of course using functions alters how you solve the problem.

Of course you have to use parameters.

I suggest you try playing around with some very simple function calls until things become clear as you won't be able to do very much at all in C++ without understanding the concept.