参考博客——
https://www.cnblogs.com/kt-xb/p/12297023.html
Linux——
进入Scala所在目录，创建文件夹mycode
赋予文件夹权限
chmod -R 777 文件夹所在目录
创建test.scala ，输入代码，执行文件
代码内容——
import scala.io.StdIn
object test
{
def main(args: Array[String])
{
var Sum=0.0
println("请输入n")
var n:Long=StdIn.readLine().toLong
var i=1.0
while(Sum<n)
{
var mid=(i+i)/i
Sum=Sum+(i+1)/i
i=i+1
}
println("**************************")
println("计算级数为：",Sum)
}
}
第一题结束
后边路流程与最后两步相同
所需代码
case class Point(var x:Double ,var y:Double) extends Drawable{
def shift(X:Double ,Y:Double){
x += X
y += Y
}
}
trait Drawable{
def draw(){println(this.toString)}
}
abstract class Shape(var location:Point)//location是shape的一个可变字段
{
def moveTo(newLocation:Point)
{
location = newLocation
}
def zoom(scale:Double)
}
class Line(beginPoint:Point,var endPoint:Point)extends Shape(beginPoint) with Drawable{
override def draw()
{
println(s"Line:(${location.x},${location.y}--(${endPoint.x},${endPoint.y})")
}
override def moveTo(newLocation:Point)
{
endPoint.shift(newLocation.x-location.x,newLocation.y-location.y)
location = newLocation
}
override def zoom(scale:Double)
{
val midPoint=Point((endPoint.x+location.x)/2,(endPoint.y+location.y)/2)
location.x=midPoint.x+scale*(location.x-midPoint.x)
location.y=midPoint.y+scale*(location.y-midPoint.y)
endPoint.x=midPoint.x+scale*(endPoint.x-midPoint.x)
endPoint.y=midPoint.y+scale*(endPoint.y-midPoint.y)
}
}
class Circle(center:Point,var radius:Double)extends Shape(center) with Drawable
{
override def draw()
{
println(s"Circle center:(${location.x},${location.y}),R=$radius")
}
override def zoom(scale :Double)
{
radius = radius*scale
}
}
object test2
{
def main(args:Array[String])
{
val p = new Point(10,30)
p.draw
val line1 = new Line(Point(0,0),Point(20,20))
line1.draw
line1.moveTo(Point(5,5))
line1.draw
line1.zoom(2)
line1.draw
val circle = new Circle(Point(10,10),5)
circle.draw
circle.moveTo(Point(30,20))
circle.draw
circle.zoom(0.5)
circle.draw
}
}
import scala.collection.mutable.ArrayBuffer
object test3 {
def main(args: Array[String]): Unit = {
var students:ArrayBuffer[Student] = new ArrayBuffer[Student]()
students.append(new Student(301610, "male", 80, 64, 78))
students.append(new Student(301611, "female", 65, 87, 58))
students.append(new Student(301612, "female", 44, 71, 77))
students.append(new Student(301613, "female", 66, 71, 91))
students.append(new Student(301614, "female", 70, 71, 100))
students.append(new Student(301615, "male", 72, 77, 72))
students.append(new Student(301616, "female", 73, 81, 75))
students.append(new Student(301617, "female", 69, 77, 75))
students.append(new Student(301618, "male", 73, 61, 65))
students.append(new Student(301619, "male", 74, 69, 68))
students.append(new Student(301620, "male", 76, 62, 76))
students.append(new Student(301621, "male", 73, 69, 91))
students.append(new Student(301622, "male", 55, 69, 61))
students.append(new Student(301623, "male", 50, 58, 75))
students.append(new Student(301624, "female", 63, 83, 93))
students.append(new Student(301625, "male", 72, 54, 100))
students.append(new Student(301626, "male", 76, 66, 73))
students.append(new Student(301627, "male", 82, 87, 79))
students.append(new Student(301628, "female", 62, 80, 54))
students.append(new Student(301629, "male", 89, 77, 72))
println(students.length)
println(students(1).toString)
getData(students)
getDataMale(students)
getDataFeMale(students)
}
def getData(value: ArrayBuffer[Student]): Unit ={
var Mathaverage:Double=0;
var MathSum:Double = 0;
var MathMin:Double = value(0).Math;
var MathMax:Double = 0;
var Englishaverage:Double=0;
var EnglishSum:Double = 0;
var EnglishMin:Double = value(0).English;
var EnglishMax:Double = 0;
var Physicsaverage:Double=0;
var PhysicsSum:Double = 0;
var PhysicsMin:Double = value(0).Physics;
var PhysicsMax:Double = 0;
var number = value.length;
for (i <- 0 until value.length){
//三科总数
MathSum = value(i).Math+MathSum
EnglishSum = value(i).English+EnglishSum
PhysicsSum = value(i).Physics+PhysicsSum
//最大和最小
if(value(i).Math>MathMax){
MathMax=value(i).Math;
}
if(value(i).English>EnglishMax){
EnglishMax=value(i).English;
}
if(value(i).Physics>PhysicsMax){
PhysicsMax=value(i).Physics;
}
if(value(i).Math<MathMin){
MathMin=value(i).Math;
}
if(value(i).English<EnglishMin){
EnglishMin=value(i).English;
}
if(value(i).Physics<PhysicsMin){
PhysicsMin=value(i).Physics;
}
}
//平均值
Mathaverage=MathSum/number
Englishaverage=EnglishSum/number
Physicsaverage=PhysicsSum/number
println("course\t average\t min\t max \t")
println("Math:\t "+Mathaverage+"\t\t"+MathMin+"\t "+MathMax)
println("English:\t"+Englishaverage+"\t"+EnglishMin+"\t "+EnglishMax)
println("Physics:\t"+Physicsaverage+"\t"+PhysicsMin+"\t "+PhysicsMax)
}
def getDataMale(value: ArrayBuffer[Student]): Unit = {
var Mathaverage: Double = 0;
var MathSum: Double = 0;
var MathMin: Double = value(0).Math;
var MathMax: Double = 0;
var Englishaverage: Double = 0;
var EnglishSum: Double = 0;
var EnglishMin: Double = value(0).English;
var EnglishMax: Double = 0;
var Physicsaverage: Double = 0;
var PhysicsSum: Double = 0;
var PhysicsMin: Double = value(0).Physics;
var PhysicsMax: Double = 0;
var number = 0;
for (i <- 0 until value.length) {
if (value(i).gender.equals("male")) {
number = number + 1
//三科总数
MathSum = value(i).Math + MathSum
EnglishSum = value(i).English + EnglishSum
PhysicsSum = value(i).Physics + PhysicsSum
//最大和最小
if (value(i).Math > MathMax) {
MathMax = value(i).Math;
}
if (value(i).English > EnglishMax) {
EnglishMax = value(i).English;
}
if (value(i).Physics > PhysicsMax) {
PhysicsMax = value(i).Physics;
}
if (value(i).Math < MathMin) {
MathMin = value(i).Math;
}
if (value(i).English < EnglishMin) {
EnglishMin = value(i).English;
}
if (value(i).Physics < PhysicsMin) {
PhysicsMin = value(i).Physics;
}
}
}
//平均值
Mathaverage=MathSum/number
Englishaverage=EnglishSum/number
Physicsaverage=PhysicsSum/number
println("course\t average\t min\t max \t(Male)")
Mathaverage=Mathaverage.toInt
Englishaverage=Englishaverage.toInt
Physicsaverage=Physicsaverage.toInt
println("Math:\t "+Mathaverage+"\t\t"+MathMin+"\t "+MathMax)
println("English:\t "+Englishaverage+"\t\t"+EnglishMin+"\t "+EnglishMax)
println("Physics:\t "+Physicsaverage+"\t\t"+PhysicsMin+"\t "+PhysicsMax)
}
def getDataFeMale(value: ArrayBuffer[Student]): Unit ={
var Mathaverage:Double=0;
var MathSum:Double = 0;
var MathMin:Double = value(1).Math;
var MathMax:Double = 0;
var Englishaverage:Double=0;
var EnglishSum:Double = 0;
var EnglishMin:Double = value(1).English;
var EnglishMax:Double = 0;
var Physicsaverage:Double=0;
var PhysicsSum:Double = 0;
var PhysicsMin:Double = value(1).Physics;
var PhysicsMax:Double = 0;
var number = 0;
for (i <- 0 until value.length){
if(value(i).gender.equals("female")){
number=number+1
//三科总数
MathSum = value(i).Math+MathSum
EnglishSum = value(i).English+EnglishSum
PhysicsSum = value(i).Physics+PhysicsSum
//最大和最小
if(value(i).Math>MathMax){
MathMax=value(i).Math;
}
if(value(i).English>EnglishMax){
EnglishMax=value(i).English;
}
if(value(i).Physics>PhysicsMax){
PhysicsMax=value(i).Physics;
}
if(value(i).Math<MathMin){
MathMin=value(i).Math;
}
if(value(i).English<EnglishMin){
EnglishMin=value(i).English;
}
if(value(i).Physics<PhysicsMin){
PhysicsMin=value(i).Physics;
}
}
}
//平均值
Mathaverage=MathSum/number
Englishaverage=EnglishSum/number
Physicsaverage=PhysicsSum/number
println("course\t average\t min\t max \t(FeMale)")
Mathaverage=Mathaverage.toInt
Englishaverage=Englishaverage.toInt
Physicsaverage=Physicsaverage.toInt
println("Math:\t "+Mathaverage+"\t\t"+MathMin+"\t "+MathMax)
println("English:\t "+Englishaverage+"\t\t"+EnglishMin+"\t "+EnglishMax)
println("Physics:\t "+Physicsaverage+"\t\t"+PhysicsMin+"\t "+PhysicsMax)
}
}
class Student(id1:Int,gender1:String,Math1:Double,English1:Double,Physics1:Double){
var id:Int = id1
var gender:String = gender1
var Math:Double = Math1
var English:Double = English1
var Physics:Double = Physics1
override def toString = s"Student($id, $gender, $Math, $English, $Physics)"
}
标签：Scala,students,Double,编程,value,初级,Student,var,new
From： https://www.cnblogs.com/yansans/p/18015201