为什么我的if / else if语句不起作用？

Question

我已经在这里查看了所有其他类似的主题，我仍然无法弄清楚为什么我的程序只打印A或A-无论如何。请解释我做错了什么以及如何改变它。谢谢！

import static java.lang.System.*;
import java.util.Scanner;
public class Grading 
{
public static void main(String[] args)
{
        Scanner sc = new Scanner(System.in);

        int grade;
        out.println("Please enter your grade to be evaluated: ");
        grade = sc.nextInt();

        if(grade >= 93)
            out.println("A");
        else if(grade >= 90 && grade <= 92)
            out.println("A-");
        else if(grade >= 87 && grade <= 89)
            out.println("B+");
        else if(grade >= 83 && grade <= 86)
            out.println("B");
        else if(grade >= 80 && grade <= 82)
            out.println("B-");
        else if(grade >= 77 && grade <= 79)
            out.println("C+");
        else if(grade > =73 && grade <= 76)
            out.println("C");
        else if(grade >= 70 && grade <= 72)
            out.println("C-");
        else if(grade >= 67 && grade <= 69)
            out.println("D+");
        else if(grade >= 63 && grade <= 66)
            out.println("D");
        else if(grade >= 60 && grade <= 62)
            out.println("D-");
        else if(grade < 60)
            out.println("F");

    }
}

Answer 1

你的程序运行正常。只需改变

else if(grade > =73 && grade <= 76) 

到

else if(grade >=73 && grade <= 76)