Percentage formula not acting correctly

[ret squid]

#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
	int total_floors, floor, rooms = 0, occupied = 0, unoccupied, percentage;


	cout << "How many floors does the office building have? ";
	cin >> total_floors;



	while (total_floors <= 0 || total_floors == 13)
	{
		cout << "This building does not have any sub levels or a 13th floor please try again. \n"
			<< "How many floors does the office building have? ";
		cin >> total_floors;
	}

	while (total_floors < 1 || total_floors >14)
	{
		cout << "Enter a floor number between 1 and 14 skipping floor 13. \n"
			<< "How many floors does the office building have? ";
		cin >> total_floors;
	}



	for (floor = 1; floor <= total_floors; floor++)
	{
		if (floor == 13)
			continue;
		cout << "How many rooms are on floor " << floor << ": ";
		cin >> rooms;
		cout << "How many rooms on floor " << floor << " are occupied? ";
		cin >> occupied;
	}



	cout << setprecision(2) << fixed << showpoint;
	percentage = (occupied / rooms) * 100;	
	unoccupied = rooms - occupied;
	
	cout << "\nPercentage of rooms occupied is " << percentage << " percent." << endl;
	cout << "There are a total of " << rooms << " rooms." << endl;
	cout << "Out of the " << rooms << " rooms, " << occupied << " are occupied and "
		<< unoccupied << " are unoccupied." << endl;



	cout << endl;



	return 0;
}

[helios]

Do occupied * 100 / rooms, instead. If you try to divide integers you'll use integer division, and if x < y then x / y = 0.

[boost lexical cast]

Change line 44 to:

percentage = ((float) occupied / rooms) * 100;

or helios' way.

EDIT:

I want to ask you a question helios. Why does C-like type casting ((float) x) make x float but not functional notation (float (x))? I tested it.

Also the C++ static_cast<type>(expression) does the same as the functional notation.

Is it because the C-style type casting does not error check?

[helios]

IINM, T(x) and (T)x are equivalent as long as T is not a two-word type name, such as 'unsigned int'.

[boost lexical cast]

Hmmm... well gives different results for me.

Using GNU g++ -std=c++14.