assignment 2 dif.c

/*
Group Members:
 	1.ABUBAKAR YAGOUB IBRAHIM OMER, 1625897
	 2.AYHAM KHADER ALI, 1637927
 	3.GEHAD ABBAS SEIDAHMED,1621469
 	4.ABDUL-RAHMAN FAYYADAH, 1628735
 	5.MOHAMMED GAAFAR MUSOUD, 1624491
 	6.
*/
#include <stdio.h>
#define PI 3.142 // pi value 
//global variable definition so they can be used across all the functions.
int b, s; // b for big diameter and s for the small one.
float price_s, price_b, area, unit_price_b, unit_price_s;
//functions and tasks.
int GetDiameter(); // get the pizza diameter.
float Compare(float, float); // compare the two price units.
float GetPrice(); // get the pizza price.
float CalclulateUnitPrice(int, float);  //calculate the unit price using diameter and price.
int main()
{
	printf("Welcome To IIUM Pizza\n\n");
	printf("Enter diameter of small pizza <in inches>: ");
	s = GetDiameter(); // function call.
	printf("Enter diameter of big pizza <in inches>: ");
	b = GetDiameter(); // function call.
	printf("Enter the Prize of small pizza <RM>: ");
	price_s = GetPrice(); // function call.
	printf("Enter the price of big pizza <RM>:  ");
	price_b = GetPrice(); // function call.
	// now will calculate the unit price.
	unit_price_s = CalclulateUnitPrice(s, price_s);  // function call.
	unit_price_b = CalclulateUnitPrice(b, price_b);  // function call.
	Compare(unit_price_b, unit_price_s);
	return 0;
}
int GetDiameter()
{
	int d;  // temp variable for storing the Diameter
	scanf("%d", &d);
	return d; // return the user inputed value
}
float GetPrice()
{
	float p;  // temp variable for storing the price
	scanf("%f", &p);
	return p; // return the user inputed value
}
float CalclulateUnitPrice(int x, float y)
{
	// calculate unit price.
	float c; // temp variable for storing the unit price
	area = PI * (x / 2) * (x / 2); // first calculate the area (since its a circle)
	c = y / area; // calculating the unit price
	return c; // return calculated value
}
float Compare(float x, float z)
{
	// compare the two unit prices.
	if (x < z)
	{
		printf("The large one is the better buy.\n");
	}
	else if (z < x)
	{
		printf("The small one is the better buy.\n");
	}

}