View Compilation Error

0_0_37012927_4888\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_37012927_4888\Main.java:4: 错误: 需要class, interface或enum
		while(sc.hasNext()){
		^
0_0_37012927_4888\Main.java:6: 错误: 需要class, interface或enum
		double y1=sc.nextDouble();
		^
0_0_37012927_4888\Main.java:7: 错误: 需要class, interface或enum
		double x2=sc.nextDouble();
		^
0_0_37012927_4888\Main.java:8: 错误: 需要class, interface或enum
		double y2=sc.nextDouble();
		^
0_0_37012927_4888\Main.java:9: 错误: 需要class, interface或enum
		double ans=Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
		^
0_0_37012927_4888\Main.java:10: 错误: 需要class, interface或enum
		System.out.printf("%.2f",ans);
		^
0_0_37012927_4888\Main.java:11: 错误: 需要class, interface或enum
		System.out.println();
		^
0_0_37012927_4888\Main.java:12: 错误: 需要class, interface或enum
	}}
	^
9 个错误