import java.util.Scanner;public class AverageMark{ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); int mark[] = { 0, 0, 0, 0 }; System.out.printf("Enter integer mark %s between 0 and 100: ", i + 1); } System.out.println("Thanks for entering your marks.\n"); double average = (mark[0] + mark[1] + mark[2] + mark[3]) * 0.25; String grade; if (average >= 90) { grade = "A+"; } else if (average >= 80) { grade = "A"; } else if (average >= 70) { grade = "B"; } else if (average >= 60) { grade = "C"; } else if (average >= 50) { grade = "D"; } else grade = "F"; System.out.printf("Your average is: %.2f\n", average); System.out.printf("Your average of %.2f has a letter grade of %s", average, grade); }}//嗨,抱歉之前的编辑,我是这个网站的新手。这是我写的代码,但我不确定为什么它不会运行。似乎有些东西可能会丢失,但我很不清楚。请帮忙谢谢
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