cpp 8.5

8.5

#include<iostream>
double cube(double a);
double refcube(double &ra);
int main()
{
	using namespace std;
	double x = 3.0;

	cout << cube(x);
	cout << " = cube of " << x << endl;
	cout << refcube(x);
	cout << " = cube of " << x << endl;

	system("pause");
	return 0;
}
double cube(double a)
{
	a *= a*a;
	return a;
}

double refcube(double &ra)
{
	ra *= ra*ra;
	return ra;
}

8.6

#include<iostream>
#include<string>
struct free_throws
{
	std::string name;
	int made;
	int attempts;
	float percent;
};

void display(const free_throws & ft);
void set_pc(free_throws &ft);
free_throws &accumulate(free_throws & target, const free_throws & source);

int main()
{
	free_throws one = { "Ifelsa Branch", 13, 14 };
	free_throws two = { "Andor Knott", 10, 16 };
	free_throws three = { "Minnie Max", 7, 9 };
	free_throws four = { "Whily Looper", 5, 9 };
	free_throws five = { "Long Long", 6, 14 };
	free_throws team = { "Throwgoods", 0, 0 };

	free_throws dup;

	set_pc(one);
	display(one);
	accumulate(team, one);
	display(team);

	display(accumulate(team, two));
	accumulate(accumulate(team, three), four);
	display(team);

	dup = accumulate(team, five);
	std::cout << "Displaying team:\n";
	display(team);
	std::cout << "Display dup after assignment:\n";
	display(dup);
	set_pc(four);

	accumulate(dup, five) = four;
	std::cout << "Displaying dup after ill-advise assignment:\n";
	display(dup);

	system("pause");
	return 0;
}

void display(const free_throws & ft)
{
	using std::cout;
	cout << "Name: " << ft.name << '\n';
	cout << " Made: " << ft.made << '\t';
	cout << "Attempts: " << ft.attempts << '\t';
	cout << "Percent: " << ft.percent << '\n';
}

void set_pc(free_throws & ft)
{
	if (ft.attempts != 0)
		ft.percent = 100.0f *float(ft.made) / float(ft.attempts);
	else
		ft.percent = 0;
}

free_throws & accumulate(free_throws & target, const free_throws & source)
{
	target.attempts += source.attempts;
	target.made += source.made;
	set_pc(target);
	return target;
}