View Compilation Error

0_0_18673839_14214\Main.java:9: 错误: 需要class, interface或enum
	public static void main(String[] args) {
	              ^
0_0_18673839_14214\Main.java:12: 错误: 需要class, interface或enum
	    int n;
	    ^
0_0_18673839_14214\Main.java:13: 错误: 需要class, interface或enum
		BigInteger m;
		^
0_0_18673839_14214\Main.java:14: 错误: 需要class, interface或enum
		while(scanner.hasNextBigInteger()){
		^
0_0_18673839_14214\Main.java:16: 错误: 需要class, interface或enum
			m=BigInteger.ONE;
			^
0_0_18673839_14214\Main.java:17: 错误: 需要class, interface或enum
			for(int i=2;i<=n;i++)
			^
0_0_18673839_14214\Main.java:17: 错误: 需要class, interface或enum
			for(int i=2;i<=n;i++)
			            ^
0_0_18673839_14214\Main.java:17: 错误: 需要class, interface或enum
			for(int i=2;i<=n;i++)
			                 ^
0_0_18673839_14214\Main.java:19: 错误: 需要class, interface或enum
			System.out.println(m);
			^
0_0_18673839_14214\Main.java:20: 错误: 需要class, interface或enum
		}
		^
10 个错误