java运算符作业

一、计算牛奶蛋白质的总量

import java.util.Scanner;

public class Niu {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);//开启扫描

System.out.println("请输入购买牛奶的盒数：");

double a = 6.4;//已知每盒牛奶的蛋白质

int b = sc.nextInt();//记录数字

System.out.println(b+"袋牛奶含有的蛋白质："+(a*b));//计算蛋白质含量

sc.close();//关闭扫描

}

}

二、输出肯德基一天下售出汉堡的数量及金额

import java.util.Scanner;

public class KDJ {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);//开启扫描

System.out.println("请输入出售汉堡的数量：");//输出数字

double a = 15.5;//假设每个汉堡的价格

int b = sc.nextInt();

System.out.println("一天总出售的汉堡数量:"+b+"个");

System.out.println("全天出售处的总金额："+(a*b)+"元");

sc.close();//关闭扫描

}

}

三、将高铁速度km/h转换为m/s

import java.util.Scanner;

public class Sudu {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);//开启扫描

System.out.println("请输入速度：");//输入速度

double a = 3.6;

int b = sc.nextInt();

System.out.println(b+"km/h = "+(b/a)+"m/s");//计算速度

sc.close();//关闭扫描

}

}

四、地铁购票金额计算

import java.util.Scanner;

public class Ditie {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);//开启扫描

System.out.println("目的车站：人民广场");

System.out.println("票价：2.00");

System.out.println("购买数量：");

double a = 2.0;

int b = sc.nextInt();

System.out.println("应付金额："+(b*a));

int c = sc.nextInt();

System.out.println("找零："+(c-b*a));

sc.close();//关闭扫描

}

}