would this be right?

Code:
#include<iostream>
using namespace std;

int main(void)
{

   double roomSize = 0.0;
   double students = 0.0;

   cout << "please enter room size " << endl;
   cin >> roomSize;
   cout << " please enter number of students " << endl;
   cin << students;

   availseats = (roomSize - students);

   cout << "the number of availseats are: " << availseats << endl;

   system("pause");
   return 0;