// Program file:  iftest.cpp
// Demonstrates the use of if statements

#include <iostream>
#include <iomanip>
#include <conio.c>

using namespace std;

void enter_data(int &a, int &b, int &c, int &d);
int if_function(int a,  int b,  int c,  int d);
void display_result(int r);

int main()
{
	int a, b, c, d, r;

	enter_data(a, b, c, d);
	r = if_function(a, b, c, d);
	getch();
	display_result(r);
	system("pause");
	return 0;
}

int if_function(int a,  int b,  int c,  int d)
{
	int r = 0;

	if (a > b)
	{
		r = a;
		if (a < c)
		{
			r += c;
		}
		else
		{
			if (b == d)
			{
				r += d;
				if (c > d)
					r += b;
				else
					r += d;
			}
			else
				r += 4;
			r += 5;
		}
	}
	else
		if (a >= c)
			r += 6;
		else
			r += 7;
	return r;
}









void enter_data(int &a, int &b, int &c, int &d)
{
	cout << "Enter the value for 'a':  ";
	cin  >> a;
	cout << "Enter the value for 'b':  ";
	cin  >> b;
	cout << "Enter the value for 'c':  ";
	cin  >> c;
	cout << "Enter the value for 'd':  ";
	cin  >> d;
}

void display_result(int r)
{
	cout << "The final value for 'r' is:  " << r << endl;
}