The problem
Suppose you shop for rice in two different packages. You would like to write a program to compare the cost. In this examples, write a program prompt the user to enter the weight and price of the each package and displays the one with the better price.
Breaking it down
public static void main(String[] strings) {
Scanner input = new Scanner(System.in);
System.out.print("Enter weight and price for package 1: ");
double weight1 = input.nextDouble();
double price1 = input.nextDouble();
System.out.print("Enter weight and price for package 2: ");
double weight2 = input.nextDouble();
double price2 = input.nextDouble();
input.close();
if (calculateBetterPrice(weight1, price1, weight2, price2)) {
System.out.println("Package 1 has a better price.");
} else {
System.out.println("Package 2 has a better price.");
}
}
private static boolean calculateBetterPrice(double weight1, double price1,
double weight2, double price2) {
return price1 * 1.0D / weight1 >= price2 * 1.0D / weight2;
}Output
Enter weight and price for package 1: 50 24.59
Enter weight and price for package 2: 25 11.99
Package 1 has a better price.