/*
//第二题
import java.util.*;
class Cylinder{
int r,h;
void Cylinder(int r,int h){
this.r=r;
this.h=h;
}
final double PI=3.14d;
public void getArea(){
System.out.println("底面积为:"+PI*r*r);
}
public void getVolume(){
System.out.println("体积为:"+PI*r*r*h);
}
public static void main(String [] args){
Cylinder s=new Cylinder();
s.Cylinder(2,7);
s.getArea();
s.getVolume();
}
}
*/
/*
//第一题
class Cylinder{
int r,h;
public Cylinder(){
r=2;
h=7;
}
final double PI=3.14d;
public void getArea(){
System.out.println("底面积为:"+PI*r*r);
}
public void getVolume(){
System.out.println("体积为:"+PI*r*r*h);
}
public static void main(String [] args){
Cylinder s=new Cylinder();
s.getArea();
s.getVolume();
}
}
*/
/*
//第三题
class CalcuMin{
public int getMin(int arr[]){
int min=arr[0];
for(int i=0;i<arr.length;i++){
min=Math.min(min,arr[i]);
}
return min;
}
public static void main(String args[]){
CalcuMin s=new CalcuMin();
int arr[]={4,8,4,1,233,674};
int min=s.getMin(arr);
System.out.println("最小值为:"+min);
}
}
*/
/*
第四题
class Student{
public void Grade(int[] sum){
int j=0;
for(int i=0;i<sum.length;i++){
if(sum[i]>=90){
j++;
}
}
System.out.println("优秀人数为:"+j);
}
public static void main(String args[]){
Student stu=new Student();
int sum[]={67,98,78,89,90,65,91,76,99};
stu.Grade(sum);
}
}
*/
/*
//第七题
class Test{
String name;
int age;
char sex;
float grade;
void Test(String name,int age,char sex,float grade){
this.name=name;
this.age=age;
this.sex=sex;
this.grade=grade;
}
public void getInfor(){
System.out.println(name+"\t"+age+"\t"+sex+"\t"+grade);
}
public static void main(String args[]){
Test t=new Test();
t.Test("zhang",19,'M',85.0f);
t.getInfor();
}
}
*/