View Compilation Error

0_0_38069940_20833\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_38069940_20833\Main.java:3: 错误: 需要class, interface或enum
            while (sc.hasNext()) {
            ^
0_0_38069940_20833\Main.java:5: 错误: 需要class, interface或enum
                if (grade > 100 || grade < 0) {
                ^
0_0_38069940_20833\Main.java:7: 错误: 需要class, interface或enum
                }
                ^
0_0_38069940_20833\Main.java:12: 错误: 需要class, interface或enum
                    } else if (grade >= 80) {
                    ^
0_0_38069940_20833\Main.java:14: 错误: 需要class, interface或enum
                    } else if (grade >= 70) {
                    ^
0_0_38069940_20833\Main.java:16: 错误: 需要class, interface或enum
                    } else if (grade >= 60) {
                    ^
0_0_38069940_20833\Main.java:18: 错误: 需要class, interface或enum
                    } else  {
                    ^
0_0_38069940_20833\Main.java:20: 错误: 需要class, interface或enum
                    }
                    ^
9 个错误