请告诉我这个该怎么修改

package Zyi;

    public class Zuoye {

        public static void main(String[] args) {
            int result = 75;
            if (result <= 75 && result >= 60) {
                System.out.println("及格");
            } else if (result >= 90) {
                System.out.println("优秀");
            } else {
                System.out.println("良好");
            }
        }
    }

result没有定义

import java.util.Scanner;

public class DemoApplication {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入成绩：");
        int result = scanner.nextInt();
        if (result < 60) {
            System.out.println("不及格");
        } else if (result < 75) {
            System.out.println("及格");
        } else if (result < 90) {
            System.out.println("良好");
        } else {
            System.out.println("优秀");
        }
    }

}