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View Compilation Error

0_0_36679183_14360\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_36679183_14360\Main.java:3: 错误: 需要class, interface或enum
		while(sc.hasNext()) {
		^
0_0_36679183_14360\Main.java:5: 错误: 需要class, interface或enum
			double r = sc.nextDouble();
			^
0_0_36679183_14360\Main.java:6: 错误: 需要class, interface或enum
			double num = r*r*r*PI*4/3;//除不尽的小数影响精度,所以需要放在最后。
			^
0_0_36679183_14360\Main.java:7: 错误: 需要class, interface或enum
			System.out.println(String.format("%.3f", num));//保留小数点后三位,所以f前是3.
			^
0_0_36679183_14360\Main.java:8: 错误: 需要class, interface或enum
		}
		^
6 个错误


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