*3.33（金融：比较成本）假设你要通过两种不同的包裹运输大米。你可能会编写一个程序来比较成本，该程序提示用户输入每个包裹的重量和价格，然后显示具有更优惠的包裹。 下面是一个运行示例： Here is a sample run: Enter weight and price for package 1: 50 24.59 Enter weight and price for package 2: 25 11.99 Package 2 has a better price. Enter weight and price for package 1: 50 25 Enter weight and price for package 2: 25 12.5 Two package have the same price.
*3.33(Financial: compare costs)Suppose you shop for rice in two different packages. You would like to write a program to compare the cost. The program prompts the user to enter the weight and price of each package and displays the one with the better price. Here is a sample run: Enter weight and price for package 1: 50 24.59 Enter weight and price for package 2: 25 11.99 Package 2 has a better price. Enter weight and price for package 1: 50 25 Enter weight and price for package 2: 25 12.5 Two package have the same price.
参考代码：
package chapter03; import java.util.Scanner; public class Code_33 { public static void main(String[] args) { double weightPackage1,pricePackage1; double weightPackage2,pricePackage2; System.out.print("Enter weight and price for package 1: "); Scanner input = new Scanner(System.in); weightPackage1 = input.nextDouble(); pricePackage1 = input.nextDouble(); System.out.print("Enter weight and price for package 2: "); weightPackage2 = input.nextDouble(); pricePackage2 = input.nextDouble(); if(pricePackage1 / weightPackage1 < pricePackage2 / weightPackage2) System.out.println("Package 1 has a better price."); else if(pricePackage1 / weightPackage1 > pricePackage2 / weightPackage2) System.out.println("Package 2 has a better price."); else System.out.println("Two packages have the same price."); input.close(); } } 结果显示： Enter weight and price for package 1: 50 24.59 Enter weight and price for package 2: 25 11.99 Package 2 has a better price. Process finished with exit code 0