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View Compilation Error

0_0_12109629_19969\Main.java:3: 需要为 class、interface 或 enum
	public static void main(String[] args) {
	              ^
0_0_12109629_19969\Main.java:6: 需要为 class、interface 或 enum
		String a,b;
		^
0_0_12109629_19969\Main.java:7: 需要为 class、interface 或 enum
		a=sc.next();
		^
0_0_12109629_19969\Main.java:8: 需要为 class、interface 或 enum
		b=sc.next();
		^
0_0_12109629_19969\Main.java:9: 需要为 class、interface 或 enum
		java.math.BigInteger a1=new java.math.BigInteger(a); 
		^
0_0_12109629_19969\Main.java:10: 需要为 class、interface 或 enum
		java.math.BigInteger b1=new java.math.BigInteger(b);
		^
0_0_12109629_19969\Main.java:11: 需要为 class、interface 或 enum
		java.math.BigInteger sum=a1.add(b1);
		^
0_0_12109629_19969\Main.java:12: 需要为 class、interface 或 enum
		System.out.println(sum);
		^
0_0_12109629_19969\Main.java:13: 需要为 class、interface 或 enum
	}
	^
9 错误


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