findsalesamount.java

大学java作业源程序

package problem_3;
//FindSaleAmount.java
import java.io.*;

public class FindSalesAmount {
	public static void main(String[] args){
		try{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			System.out.print("Expected income = ");
			Double income = Double.valueOf(br.readLine());	//读入总收入
			income -= 5000;
			if(income.compareTo(new Double(0)) < 0)		//不可能情况：收入小于5000
				System.out.println("Income should be no less than 5,000");
			else{
				Double salesAmount;		//总销售额
				if(income.compareTo(new Double(400)) <= 0)
					salesAmount = (int)(income / 0.08 * 100) / 100.0;
				else if(income.compareTo(new Double(900)) <= 0)
					salesAmount = (int)((income + 100) / 0.1 * 100) / 100.0;
				else
					salesAmount = (int)((income + 300) / 0.12 * 100) / 100.0;
				System.out.println("Sales amount = " + salesAmount.toString());	//输出总销售额
			}
		}
		catch(IOException e){
			System.out.println(e);
		}
	}
}