cpp 3.10

3.10

#include <iostream>
int main()
{
	using namespace std;
	float hats, heads;

	cout.setf(ios_base::fixed, ios_base::floatfield);
	cout << "Enter a number: ";
	cin >> hats;
	cout << "Enter another number: ";
	cin >> heads;

	cout << "hats = " << hats << "; heads = " << heads << endl;
	cout << "hats + heads = " << hats + heads << endl;
	cout << "hats - heads = " << hats - heads << endl;
	cout << "hats * heads = " << hats * heads << endl;
	cout << "hats / heads = " << hats / heads << endl;
	system("pause");
	return 0;
}

3.11

#include <iostream>
int main()
{
	using namespace std;
	float hats, heads;

	cout.setf(ios_base::fixed, ios_base::floatfield);
	cout << "Integer division: 9/5 = " << 9 / 5 << endl;
	cout << "Floating-point division: 9.0/5.0 = " << 9.0 / 5.0 << endl;
	cout << "Mixed division: 9.0/5 = " << 9.0 / 5 << endl;
	cout << "double constants: 1e7/9.0 = " << 1e7 / 9.0 << endl;
	cout << "float constants: 1e7f/9.0f = " << 1e7f / 9.0f << endl;

	system("pause");
	return 0;
}

3.12

#include <iostream>
int main()
{
	using namespace std;
	const int Lbs_per_stn = 14;
	int lbs;

	cout << "Enter your weight in pounds: ";
	cin >> lbs;
	int stone = lbs / Lbs_per_stn;
	int pounds = lbs % Lbs_per_stn;
	cout << lbs << " pounds are " << stone
		<< " stone, " << pounds << " pound(s).\n";



	system("pause");
	return 0;
}