View Compilation Error

0_0_37157270_31242\Main.java:1: 错误: 需要class, interface或enum
	public static void main(String[] args) {
	              ^
0_0_37157270_31242\Main.java:3: 错误: 需要class, interface或enum
		while(sc.hasNext()) {
		^
0_0_37157270_31242\Main.java:5: 错误: 需要class, interface或enum
			if(n==0) {
			^
0_0_37157270_31242\Main.java:7: 错误: 需要class, interface或enum
			}
			^
0_0_37157270_31242\Main.java:9: 错误: 需要class, interface或enum
			while(n-->0) {
			^
0_0_37157270_31242\Main.java:11: 错误: 需要class, interface或enum
				if(num<0) {
				^
0_0_37157270_31242\Main.java:13: 错误: 需要class, interface或enum
				}else if(num==0) {
				^
0_0_37157270_31242\Main.java:15: 错误: 需要class, interface或enum
				}else {
				^
0_0_37157270_31242\Main.java:17: 错误: 需要class, interface或enum
				}
				^
0_0_37157270_31242\Main.java:20: 错误: 需要class, interface或enum
		}
		^
10 个错误