View Compilation Error

0_0_38407428_21285\Main.java:2: 错误: 需要class, interface或enum
	public static void main(String[] args) {
	              ^
0_0_38407428_21285\Main.java:5: 错误: 需要class, interface或enum
		while (sc.hasNext()) {
		^
0_0_38407428_21285\Main.java:7: 错误: 需要class, interface或enum
			double y1 = sc.nextDouble();
			^
0_0_38407428_21285\Main.java:8: 错误: 需要class, interface或enum
			double x2 = sc.nextDouble();
			^
0_0_38407428_21285\Main.java:9: 错误: 需要class, interface或enum
			double y2 = sc.nextDouble();
			^
0_0_38407428_21285\Main.java:11: 错误: 需要class, interface或enum
			double sum = (x1 - x2) * (x1 - x2) + (y2 - y1) * (y2 - y1);
			^
0_0_38407428_21285\Main.java:13: 错误: 需要class, interface或enum
			sum = Math.pow(sum, 0.5);
			^
0_0_38407428_21285\Main.java:14: 错误: 需要class, interface或enum
			System.out.printf("%.2f", sum);
			^
0_0_38407428_21285\Main.java:15: 错误: 需要class, interface或enum
			System.out.println();
			^
0_0_38407428_21285\Main.java:17: 错误: 需要class, interface或enum
		}
		^
10 个错误