import java.util.Scanner;

public class MethodTest {

//3个学生， 平均分 和最高分。不能定义全局变量

public static void main(String[] args) {

int[] students = new int[3];//{0,0,0}

MethodTest test = new MethodTest();

test.myInput(students);

double avg = test.calcAvg(students);

int sum = test.calcSum(students);

int max = test.calcMax(students);

}

//student = {0,0,0}

public void myInput(int[] students) {

Scanner input = new Scanner(System.in);

System.out.println("请输入第一个学生成绩:");

students[0] = input.nextInt();//99

System.out.println("请输入第二个学生成绩:");

students[1] = input.nextInt();//88

System.out.println("请输入第三个学生成绩:");

students[2] = input.nextInt();//77

// students = new int[]{student1,student2,student3} ;

}

public double calcAvg(int[] students) {

// int sum = 0 ;

// for(int student:students){

// sum += student ;

// }

int sum = calcSum(students);

return sum * 1.0 / students.length; //299.0/3

}

public int calcSum(int[] students) {

int sum = 0;

for (int student : students) {

sum += student;

}

return sum;

}

public int calcMax(int[] students) {

int max = students[0];

for (int i = 1; i < students.length; i++) {

if (max < students[i]) {

max = students[i];

}

}

return max;

}

}